Portwrinkle to Downderry circular walk
  1. From the car park, facing the sea, follow the lane to your right, past the "No Vehicular Access to the Beach" sign to reach a junction beside a "No access for motor vehicles" sign.

    The first harbour at Portwrinkle was thought to have been built in 1605, just after the end of the Tudor period, to support a pilchard fishery. A few stones from this original structure remain, and can be seen at low tide. The majority dates from 1822 when the quay was rebuilt after being destroyed by a storm. The storms of 2014 also punched a hole through the harbour wall, which has since been repaired. During Victorian times, the village was also known as Portwrickle.

  2. Keep left to follow the lane ahead and continue past the slipway and uphill until you reach a coast path sign to Downderry next to a gate on the left.

    The walls of the 17th Century pilchard cellars still stand above Portwrinkle harbour. Part of the building has been restored and converted into holiday accommodation.

  3. Go through the gate beside the coast path sign and follow the path to a pedestrian gate.

    Alexanders are very salt tolerant so they thrive in Cornwall's salty climate. They are just as likely to be found along coastal footpaths as along country lanes. New growth appears in the autumn so during the winter, when most other plants are dormant, it is a dominant source of greenery along paths and lanes in exposed coastal areas.

    The striking magenta flowers seen in Cornish hedgerows and gardens in May and June are known as Whistling Jacks, Mad Jacks, Cornish Jacks or Corn Flag. The "whistling" is thought to be from children using the leaves as a reed between their fingers and blowing. The plant is a species of Gladioli originally from the Mediterranean but has been naturalised in Cornwall for some time. Opinions differ on exactly when it first arrived but numerous opportunities have existed during the trade that has taken with Cornwall over the centuries, and the great gardens and cut flower industries in more recent times.

    Stonechats are robin-sized birds with a black head and orange breast that are common along the Cornish coast all year round.

    A similar-looking bird called the whinchat is also present in the summer but this can be identified by a white stripe across its eye. Both stonechats and whinchats can often be spotted perching on dead sticks or brambles protruding above gorse and heather, and consequently the term "gorse chat" or "furze chat" has been used locally to mean either species. For a long time, stonechats and whinchats were thought to be members of the thrush family but genetic studies have revealed they are actually members of the (Old World) flycatcher family.

  4. Continue through the gate and follow the coast path to eventually reach another pedestrian gate after climbing the headland.

    In 1917, the SS Rosehill was passing Fowey on its way from Cardiff to Devonport with a cargo of coal when it was torpedoed by the German U-Boat UB40. The damaged vessel was towed for the remainder of its journey but sank in Whitsand Bay just before reaching Devonport. By the end of World War One, UB40 had sunk over 100 ships.

  5. Go through the gate and cross the field to the gate opposite. Continue following the path through a sequence of gates to pass a black-and-white, triangular nautical marker and reach a waymark where the path climbs alongside a fence.

    Ravens nest along the coast.

    Ravens are the largest member of the crow family and have a bigger wingspan than a buzzard. They are most easily distinguished from other members of the crow family by their very large black beak which has a hooked top. Other members of the crow family have straighter beaks. Their call is a deep croak.

  6. Follow the path uphill from the waymark, along the fence, to reach a pedestrian gate.

    Burdock flowers in July and August with pink flowers which look a little like thistle flowers. However burdock's soft, broad, foxglove-like leaves make it easy to distinguish.

    The "bur" in the name of the plant (and also the word for the rough edges on metal) comes from the Viking word for "bristle". The "dock" is a reference to the large leaves. It was known as butterdock in East Cornwall dialect, perhaps because the leaves were used to wrap butter as with butterbur leaves.

    Burdock seeds contain small hooks which attach to passing animals or clothing. After a walk in the woods in 1941 that was followed by the lengthy process of removing these from clothing and dogs, a Swiss engineer realised that there was scope to apply this to something useful. The product inspired by nature (aka "biomimicry") was described as "the zipperless zipper". Today is it better known by the name of company he founded based on the French words for velvet (velour) and hook (crochet): Velcro.

    In Jan 1914, the A7 along with 5 other submarines took part in a series of dummy attacks against surface ships in Whitsand Bay. Part-way through the exercise the A7 failed to surface after diving for an attack run. The surface ship returned to where the submarine had dived and found an uprush of bubbles indicating the submarine was attempting to blow water from the ballast tanks in a desperate attempt to surface. A buoy was dropped to mark the position but by the time rescue ships had arrived, the buoy could not be found. The 11 man submarine crew only had enough air to last six hours and perished. A six day search operation was conducted to locate the submarine to find out what had gone wrong. The submarine was found to be so firmly embedded into the mud on the seabed that all attempts to pull it free failed. A video has been made of the story which is available on YouTube

  7. Go through the gate and continue on the path to reach some steps. Climb these and follow the path a few paces further around the end of a wall to reach a waymark.

    Skylarks are the most common member of the lark family in Britain and are often known simply as "larks".

    In late spring and summer, listen out for the characteristic song of skylarks hovering high above the ground. The rapid song takes place in quite a narrow frequency range but can contain more than 450 syllables used in highly variable patterns. This is the reason it sounds a bit like the "modem" devices used to transfer digital data as an audio signal.

  8. When you reach the waymark, keep right to follow the path up the steps and continue to reach a pedestrian gate between a pair of metal gates.

    For many centuries, it was traditional for landowning families to create trusts from the land and assets so future generations could live off the income, but were unable to dispose of the assets so these would be available for future generations. The Duchy estate is an example of this and was created in 1337 by Edward III to provide his son (and future Princes of Wales) with an income. Consequently, unlike other Royals, the Prince of Wales and his family are not paid for by the taxpayer via the Civil List; instead their living costs and all their charitable activities (such as The Prince's Trust) are funded by income from the Duchy estate.

    Only 13% of the Duchy land is in Cornwall; the rest is dotted over 23 other counties with some in London but most is in the South West of England, with nearly half on Dartmoor.

  9. Go through the waymarked wooden gate ahead and follow the coast path to reach another pedestrian gate.

    Common knapweed (also known as black knapweed) is most easily recognised by its bright purple thistle-like flowers but without spiky leaves. It's actually a member of the daisy family and is often seen along paths and roadside verges. Other names for the plant include "hardhead" (used in Cornwall in Victorian times) and "loggerhead" due to the sturdy flower heads. "knap" is from the Middle English word for "knob" and consequently another name for the plant is "knobweed".

    It is an important plant for pollinating insects and was rated in the top 5 for most nectar production in a UK plants survey. In terms of plants that produce both nectar and pollen, it is rated as the top producer overall, producing a good amount of each.

    Looe Island has been inhabited since the Iron Age. Roman coins, pieces of Amphora and stone boat anchors all point to continued habitation and possibly trade before the Dark Ages. From the 13th to the 16th Centuries, the island was known as St Michael's Island, and after 1584 it became known as St George's Island.

    Looe Island also had a history of smuggling, and the first cottage on Looe Island was built by smugglers. The second cottage on the island was built by the Revenue to clamp down on the smuggling!

    In 1965 the island was bought by two sisters who lived there for the rest of their lives. The island was left to the Cornwall Wildlife Trust who now manage it as a nature reserve.

  10. Go through the gate and follow the path until it emerges onto a road.

    During late winter or early spring, if you encounter a patch of plants with white bell-shaped flowers, smelling strongly of onions, and with long, narrow leaves then they are likely to be three-cornered leeks. Once you're familiar with their narrow, ridged leaves, you'll be able to spot these emerging from late October onwards.

    All parts of the plant are edible by humans and the flavour of the leaves is relatively mild so they can be used in recipes in place of spring onions or chives. They are at their best for culinary use from November to April. By mid-May, they have flowered and the leaves are starting to die back.

    The long leaves can be mistaken for bluebells or daffodils which are both poisonous but do not smell of onions. However, fingers that have previously picked 3-cornered leeks also smell of onions and so mistakes have been made this way.

    Since the multi-lobed leaves are found in shade, whist the teardrop leaves are found in sun, this allows the leaves of ivy plants growing up trees to be used as a compass. Unless something is in the way then the sunniest side of a tree is to the south and the shadiest is to the north.

  11. Turn left and follow the road downhill. Continue until you reach a small track to the right marked "Trewall Hill", opposite Briar Cottage.

    Downderry beach can be reached by turning left into West Camps Bay, just past Trewall Hill, and following the footpath sign at the bottom.

  12. Follow the narrow lane up Trewall Hill and continue until the lane eventually ends at a crossroads.

    The 1447 tonne iron sailing ship Rodney was built in 1874 as a sister ship to the Cutty Sark and was the fastest ship in her fleet, able to keep pace with the Cutty Sark. In 1895, she lost her figurehead in bad weather in the English Channel and this washed ashore six months later in Whitsand Bay. By 1901, the ship was renamed The Gypsy. On a return voyage from Chile with a cargo of nitrates there was a second unlucky encounter involving Whitsand Bay: losing her bearings she ran aground on the reef at Downderry and became stranded. The wreck became a hazard to fishing boats so it was blown apart with explosives. The result is strewn over a large area of seabed to the west of the slipway. The wreck is in around 7 metres of water which makes it popular with snorkelers.

  13. Cross the road to the small lane opposite and follow this until it ends in a junction.

    The area is known as No Man's Land and the structure to the left is No Man's Land Reservoir (a covered reservoir).

    Sometimes a small area of common land with unclaimed or disputed ownership occurred close to or between parish boundaries, often ignored due to relatively poor agricultural value. The name nonesmanneslond was recorded in 1320 for such areas. This has also given rise to the place name of Nowhere (in Norfolk).

    In this case, the area of land lies well inside Deviock parish.

  14. Turn right at the junction and follow the lane until it also ends in a junction.

    The large hill in the distance to the left is Kit Hill.

    Kit Hill Country Park, which includes the hill and surrounding area, was donated by the Duke of Cornwall to the Cornish people to mark the birth of Prince William in 1985. The hill was formed in the same way as Bodmin Moor by magma pushing up beneath the existing sedimentary rocks to form a body of granite and mineral veins in the cracks formed as the granite cooled. The name "kit" comes from the Old English word for a bird of prey, and the Country Park still has a population of buzzards and sparrowhawks.

  15. Bear left onto the road and follow it past Hendra to a junction on a bend next to a large barn.

    Hendra is a common Cornish place name meaning "home farm" (from the Cornish word hendre which itself is based on the words hen meaning old, and dre is equivalent to tre). Hendra was also used as a boy's first name with the meaning literally "from the family farm".

  16. Bear right onto the small lane and follow it along the right side of the barn. Continue on the lane to a group of houses at a crossroads.

    Studies have shown that crows are capable of self-discipline. If offered one piece of food now or two later, the crows will resist temptation and wait. However if the initial piece of food is a high value item such as sausage, they won't take the risk.

  17. Continue ahead on the lane to pass a barn then descend to a group of buildings with a 1925 date. Pass these to reach a public footpath to Trewrickle on the right just after the last barn.

    Based on the long distances covered by swallows, a swallow tattoo was popular with sailors to show off their sailing experience. One tradition is that a sailor would gain one swallow tattoo for each 5,000 nautical miles sailed, so a sailor with two swallows had travelled over 10,000 nautical miles.

    The name buzzard is from mediaeval English buisart which itself came from the Old French word buson. It is based on the Latin word for hawk or falcon buteo hence its scientific name is Buteo buteo.

  18. Go through the pedestrian gate beside the footpath sign and follow along the fence on the right until it ends. Continue ahead across the field to the stile opposite in the bottom fence.

    Cereal crops such as wheat and barley grow by using the energy obtained by photosynthesis to produce a chemical that reacts with carbon dioxide from the air. A problem for these plants is that as the temperature increases, this chemical is more prone to react with oxygen in the air instead of carbon dioxide. This is the main reason that these crops don't do well in tropical climates and are farmed at temperate latitudes such as in Britain. Maize uses a different chemical reaction to extract carbon dioxide from the air which is more resilient to higher temperatures and also allows these plants to lose less water through their leaves. This allows them to grow in hotter, drier climates such as the southern United States.

  19. Cross the stile and follow the path to reach a stile in a section of wooden fence.

    Despite being called red campion, its flowers are most definitely pink - varying quite widely in shade from vibrant deep pinks to very pale. The colour is produced by red anthrocyanin compounds which are also responsible for red autumn leaves and red tinges on new growth in some plants as well as flower colours. In red campion, the intensity of the colour is controlled by a pair of genes and several other genes control the exact balance of anthrocyanin compounds within the petals. These are passed down the generations and so pale pink parents are likely to produce pale pink offspring.

    Hart's tongue ferns grow along the bank on the left.

    Hart's tongue ferns thrive in shady places and are tolerant of the lime used in mortar so are sometimes found growing in old walls. It's an evergreen so leaves can be seen all year round but there's usually a flurry of new growth in mid March when new leaves can be seen gradually unfurling over a number of days.

  20. Cross the stile and continue on the path over a footbridge and a stile to emerge onto a lane.

    The stream continues a few hundred metres more to Polscoe and then becomes a tidal creek known as Sconner Lake which joins the River Lynher.

  21. Turn right onto the lane and follow it uphill to a bend where a footpath departs with a wooden fence to the left just before a field gate.

    To the left, the lane leads to Sheviock.

    The settlement of Sheviock dates from mediaeval times and was first recorded in the Domesday survey of 1086 when it was owned by the church of Tavistock. The place name is thought to be from the Cornish word sevi and the ending -ack, and mean "abounding in strawberries".

  22. Bear left off the lane and follow the footpath uphill through the fence. Continue on the path until it ends on a road.

    From December until the spring, celandine leaves are quite noticeable along the edge of paths. They have a shape similar to a "spade" in a pack of cards and are patterned with lighter green or silvery markings.

    Most waymarks you'll encounter are yellow, which is the convention for marking public footpaths, of which there are over 2000 miles in Cornwall. Permissive paths often use other colours such as black, white or green. Red and blue are reserved for byways and bridleways, respectively.

  23. Carefully cross the road to the footpath opposite and follow this until it emerges through a gateway onto a track.

    At the track, the idea here was that wooden gates across the path, when closed, triggered a bell when they are opened. These were closed when golf is being played and warn golfers that there are people crossing the path. On our last visit, the first of the gates had been removed so the future of this arrangement seems a little uncertain. In any case, be on the lookout for flying golf balls when crossing between the two gateways.

  24. Follow the track a short distance then bear left onto the footpath with a sign and wooden gateway. Follow the path until it ends in a car park.

    Snowdrops flower here in the early spring.

    Snowdrop bulbs are poisonous but contain a chemical compound which is used in the treatment of early Alzheimer's, vascular dementia and brain damage. The plant produces another substance in its leaves which inhibits the feeding of insect pests. This is being researched to see if this substance can be introduced into other plants to reduce the use of pesticides.

    In mediaeval times, golf balls were made from wood. In the 17th Century, the "featherie" was created, made from leather and stuffed with feathers. In the mid-1800s, balls moulded from sap were the first to be mass-produced. They could also be heated and re-cast if they went out of shape from being hit. However people noticed that battle-scarred balls that had been used a long time seemed to fly more consistently. Golf ball manufacturers began etching different protrusions on the surfaces in attempts to improve the aerodynamics. The potential of a ball of elastic bands was discovered by a bored golfer waiting for a friend to finish work and by the 1890s, these were being coated in sap to make golf balls. In the early 1900s, it was found that indentations (rather than protrusions) on the surface resulted in better aerodynamics.

  25. Cross the car park and follow the driveway leading from it around a bend to the right to meet the road. Turn right onto the road to return to the car park.

    Silas Finn, known locally as Finny, was an 18th Century smuggler who used to land contraband on the beaches of Portwrinkle, which were not well-known to the Revenue men. Various accounts of his story exist, but according to one, he was caught red-handed and was offered the choice of the hangman's noose or to assist in catching fellow smugglers. He reluctantly chose the latter and ended up betraying not only his close friends but also his sister. The local legend is that his restless ghost ("gook") still haunts the cliffs between Crafthole and Portwrinkle.

Hemp agrimony is a fairly tall plant that grows in damp places and produces large number of tiny pink flowers from July to September, hence an alternative common name of "raspberries and cream". The flowers are rich in nectar so bees and butterflies are often found on them. It's one of the later plants to be in flower in the hedgerows so it keeps bees and butterflies going during the early autumn.

It is unrelated to hemp and also to plants in agrimony family. The reason for "hemp" in common name and "cannabinum" in the Latin name is because the leaves look a bit like cannabis. A name of "holy rope" has also been used for it which may be another reference to hemp.

Common fleabane grows in damp areas and produces shin-height flowers resembling a large yellow daisy during July and August.

The leaves have a scent reminiscent of carbolic acid (phenol). The plant was therefore thought to be an insect repellent without too much thought given to what pollinates it. It was kept in houses in the hope of driving away fleas, hence the name. The genus name also derives from the Latin word for flea.

Blackberries are closely related to raspberries and technically neither is a berry but an aggregate of many individual tiny fruits, each containing a tiny stone like a miniature cherry.

Blackberries are high in vitamin C, K and antioxidants. The seeds, despite being a bit crunchy, contain omega-3 and -6 fatty acids and further enhance blackberries' "superfood" status.

According to folklore, you should not pick blackberries after Michaelmas Day (now known as Old Michaelmas Day, roughly corresponding to 11th October) as this is when the devil claims them. The basis for this is thought to be the potentially toxic moulds which can develop on the blackberries in the cooler, wetter weather.

A project to analyse blackberries picked from busy urban roadsides vs quiet rural lanes found that there was a slightly elevated level of lead in the blackberries from busy roadsides which is thought to have accumulated in the soil when leaded fuel was in common use. Surprisingly, commercial blackberries from supermarkets also showed higher levels of lead than the wild blackberries from rural lanes.

An impressively purple blackberry, pear and ginger chutney can be made with blackberries stashed in the freezer. Simmer 500g blackberries, a few chilli flakes, 4 chopped pears and a finely-chopped 8cm piece of fresh ginger until the liquid reduces. Add 150ml distilled or white wine vinegar, and sugar to taste (amount will depend on tartness of the blackberries). Reduce a bit longer until the desired "gloopy" consistency is achieved and finally season with a little salt to taste to balance the sweetness.

To make blackberry wine, combine 2kg blackberries + 4 litres of boiling water in a plastic container with a lid. Once the water has cooled to lukewarm, mash blackberries and add red wine yeast and pectic enzyme (blackberries contain pectin so this is needed to stop the wine being cloudy). Cover for 4-5 days then strain through muslin.

Transfer the liquid to a demijohn and add 1kg of sugar. Top up with a little more water to make it up to a gallon. After fermentation, the wine should clear by itself; in the unlikely event that it doesn't, use some finings. Rack off from the sediment and bottle; it's worth allowing the wine a year or two to mature as it massively improves with age. As a variation, you can add 500g of elderberries and increase the sugar content for a more port-like wine which will need a couple of years longer for the elderberry tannins to mellow out.

Foxgloves have a life cycle which spans two years. The seeds germinate in spring and during their first year they produce a "rosette" of large, velvety green leaves with toothed edges. These are particularly noticeable from October onwards once other vegetation has died back. The leafy foxglove plants remain dormant throughout the winter, ready for a quick start in the spring.

In spring, whilst foxgloves seeds are germinating, the established foxglove plants from the previous year start producing their characteristic flower spike. Once these have been fertilised and the seeds have been produced then the plant dies. One foxglove plant can produce over 2 million seeds.

Foxgloves are reliant on bumblebees for pollination and bumblebees are much more active when the weather is good. Partly, as an insurance policy against bad weather, foxgloves have evolved to stagger their flowering over several weeks, starting with the flowers at the base of the stalk and working up to the top, where the higher flowers protrude over other vegetation that has grown up in that time.

The male and female parts of a foxglove flower mature at different times to help avoid self-fertilisation. This also ties in with the flowers maturing at the bottom of the spike first as pollinators often start at the lowest flower and then work upwards. They land on the mature female flowers first with a cargo of pollen from another plant, and then leave via the mature male flowers with a new load of pollen.

Although nearly all foxgloves are purple, a fairly rare white form does occur and an even more rare pink form sometimes occurs along with this.

As well as attracting insects, the brightly coloured foxglove flowers serve as a warning for animals that the plants contain toxins. All parts of the plant can cause a range of ill-effects in humans from nausea to heart and kidney problems which can be fatal.

The common name "foxglove" dates back many hundreds of years but the origin is unknown. The "gloves" almost certainly refers to the shape of the flowers, and the Latin name Digitalis (finger-like) is along similar lines. The curious part is the "fox" and many different suggestions have been made as to where it came from. It is possible that it is a corruption of another word. One suggestion is "folks" which was once used to mean "fairies".

Squirrels are rodents, closely related to chipmunks and slightly more distantly to dormice. The word "squirrel" originates from an ancient Greek word meaning "shadow-tailed", referring to the bushy tail of a squirrel. A family group of squirrels is known as a "drey" (also the word for a squirrel nest). A group of unrelated squirrels is known as a "scurry", though squirrels tend not to hang out in groups.

Grey squirrels were introduced to the UK from the USA in the late 19th Century and within decades they had replaced the native red squirrel in most parts of the country.

Compared to red squirrels, grey squirrels are able to eat a wider diet (including acorns), are larger so can survive colder winters, and are better able to survive in the fragmented habitats created by urbanisation. They are also thought to be carriers of a squirrel pox virus which they usually recover from but has been fatal to red squirrels, although red squirrels are now also developing some immunity.

To date, culling of grey squirrels has not reversed their domination of woodland habitat and alternative approaches such as planting food with contraceptives are being explored as a means to control the population. The theory is that infertile squirrels can compete for food against fertile squirrels, whereas culling can create a glut of food resulting in a higher number of squirrels surviving which replace those that were exterminated. Natural predators such as goshawks or pine martens also remove more grey squirrels than red squirrels. This is because red squirrels are more savvy having co-evolved with the predators so for example they recognise the scent of pine martens and actively avoid areas with this.

Squirrels assess each of their acorns before burying them. If an acorn is too light (which suggests it might have a hole), the squirrel will eat it immediately rather than risking it going mouldy.

In order to later find the nuts that they've buried, squirrels need to be organised. Some species of squirrel have been studied and found to structure their hoards by type of nut e.g. burying all their acorns under one tree and all their conkers under another. This is equivalent to us organising all the veg onto one shelf of the fridge to make it easier to remember where to look for them.

As well as forgetting where they buried some of them, squirrels may also lose a quarter of their buried food to birds, other rodents and fellow squirrels. Squirrels therefore use dummy tactics to confuse thieves by sometimes just pretending to bury a nut.

Squirrels eyes are positioned on the sides of their head which allows them to spot predators approaching from behind them. When a squirrel spots a predator, its runs away in a zigzag pattern. This confuses many of their predators but unfortunately it doesn't work well for cars.

Young squirrels suffer a high mortality rate in the wild and less than one in three make it to adulthood. The ones that do, live on average for about 6 years, although a lucky one can live to about 12 years old. In captivity, where there are neither predators, cars nor cold winters to contend with, they can reach 20 years old.

By using their tail as a parachute, squirrels are able to survive falls from high trees. This allows them to attempt risky jumps between treetops that don't always work out. They are one of the few mammals that can (but not always) survive an impact at their terminal velocity i.e. if a squirrel jumped out of an aeroplane, it may well survive.

In urban areas in cold countries such as Canada, a black form of the grey squirrel is more common which is able to withstand the cold better both by retaining more heat and also having a slower metabolism. In wilderness areas where predators are more common, the black squirrels don't seem to do so well, perhaps because they are less camouflaged against trees than the grey ones.

Blackthorn is a spiny type of plum which is more broadly a member of the rose family. It is native to the UK and common on old farmland where blackthorn trees were planted as hedges to keep out cattle. It is still common in Cornish hedgerows today and also common on the coast as it's tolerant to salt.

Given the right conditions, a blackthorn tree can live 100 years and grow to about 20ft in height. In harsher environments such as by the coast the bushes may be as little as 2ft tall.

The name "blackthorn" is just a general reference to the dark colour of the bark, rather than anything specific to do with the thorns which are not any darker than the rest of the wood. It's primarily a comparison with hawthorn where the bark is lighter (in fact hawthorn is also known as "white thorn" despite not having white thorns). Just to confuse things further, the flowers of blackthorn are whiter than hawthorn!

In mediaeval times, blackthorn was associated with evil. This may also tie in with the English word "strife" which has Celtic origins. Straif was the name of a letter used in Celtic Ogham script and was originally the word for "sulphur". Some of the other letters in the script corresponded to tree names. In late mediaeval times, a retrospective assignment of trees to the letters in the alphabet used for Ogham that weren't already tree names became popular (sometimes known as the "tree alphabet") and blackthorn was chosen for Straif.

The expression "Blackthorn Winter" is a rural expression for a final cold snap in late March or early April when the blackthorn is in flower. It was generally used in the context of not getting too carried away (e.g. planting crops) if there was a warm week in early March as more frosts may still be yet to come.

Blackthorn wood is very tough and hard-wearing. In order to form its thorns, the tree allows the tips of the tiny stems that make up the thorns to die. The dead wood in the thorn tip is harder and therefore sharper than the living wood.

Blackthorn stems are often covered in fungi or bacteria and if a thorn punctures skin, these can sometimes cause infection. Any splinters left in the skin can also disintegrate over time and result in an immune response. If a puncture wound becomes infected, it's a good idea to get it checked-out in a minor injuries unit in case antibacterial or anti-fungal treatment is needed to prevent it escalating.

Due to blackthorn wood's toughness, it was used to make tool handles, walking sticks and as a traditional Celtic weapon for clubbing people to death! It is still regarded as the ultimate wood for making walking sticks. Once cut and trimmed, the wood needs to be dried for at least a year (often several) which allows moisture to escape and the wood to shrink and harden.

A cordial can be made from blackthorn blossom by dissolving 100g of sugar in 1 litre of warm water mixing one large handful of blossom, scaled up to produce the quantity you require.

Genetic analysis has revealed that domestic apples originated from wild apples in Kazakstan near the Chinese border. It is thought that the apple was probably the first tree to be domesticated by humans, several thousand years ago. Wild apples grew in the British Isles in Neolithic times but domesticated apples were introduced by the Romans. Over 7500 varieties of apple are now known.

Apple pips contain contain a compound called amygdalin, which is cyanide bonded with sugar. In the gut this is converted to hydrogen cyanide. If you accidentally swallow a couple then don't panic: you'd need to chew and swallow hundreds of apple pips to get a fatal dose of cyanide.

Downderry beach is mostly grey sand at high tide but as the tide goes out, rock platforms with rockpools are exposed in many places with sandy lagoons between some areas of rocks.

At low tide, it's possible to walk a mile west (right if facing the sea) along the beach to Seaton. As the tide rises, boulders below the sea wall separate the two.

Also only at the lowest point of the tide (for around an hour, depending on spring/neap tides and size of waves), the eastern (left) end of Downderry beach is connected to another half a mile of beach that ends in Shag Rock. Between the two, there is an area backed with cliffs that is covered when the tide comes in and a ridge of rock that protrudes into the sea at the end of the main Downderry beach so extra care must be taken not to be cut off by the tide if venturing this way.

The building with a "Rocket House" sign was used to store marine rockets.

The life-saving rockets were invented at the beginning of the 19th century, by Cornishman Henry Trengrouse, and were also carried aboard larger vessels. They consisted of a solid fuel rocket on a wooden pole with a line attached, and a grapple on the top of the rocket to snag and hold fast onto the target ship or shore. Despite the rockets occasionally exploding, it is recorded that the apparatus saved thousands of lives in the last 2 decades of the 19th century.

The beach immediately to the right of the harbour walls at Portwrinkle is known as Hoodny Cove. The top of the beach is greyish sand which gives way to a rock platform containing rockpools as the tide goes out. Overall the beach faces south so it gets the sun all year, but is crescent shaped so the two ends get slightly different morning/evening sunlight. The far (western) end of the beach is more sheltered from prevailing southwesterly winds by the headland and faces southeast into the morning sun.