Circular walk around Withiel and the Tremore Valley
  1. With the village hall behind you, turn left and follow the road downhill. Continue to the bottom of the hill until you pass a gate with a cattle grid on your right and reach a pedestrian gate with a Public Footpath sign.

    The name Withiel derives from the Cornish name Gwydhyel, meaning "wooded place". The settlement itself dates back to before Norman times, having 25 households when it was surveyed in 1086, for the Domesday Book. Withiel also has links with the 4th century Irish saint, St Uvel, which may indicate there was a settlement here in the Dark Ages.

  2. Go through the pedestrian gate indicated by the footpath sign and follow the path to a gate (which may be open) across the path in the corner of the field.

    There are reports from the Tudor period of the discovery of a prehistoric burial mound near Withiel:

    In Withiel parish one Gidly, not many years since, digged down a little hillock barrow called Boraneevas, in English cheapful, therewith to thicken his other ground; in the bottom of which he found three white stones triangle-wise as pillars, supporting another flat stone some two feet square, and in the midst between them, and, under it, an earthen pot half full of black slime, and ill savouring substance, which doubtless, was once the ashes of some notable person, there committed to that of burial.
  3. Go through the gate and keep right in the direction waymarked (via another gate) to continue following the grassy path around the edge of the field. Follow the path to reach a path leading out of the field into the woods.

    The river along the bottom of the valley is the Ruthern.

    The River Ruthern is one of the major tributaries of the River Camel which it joins at Grogley. The name may have come from the Cornish word "rudhen" meaning "red one".

  4. Join the path leading into the woods and follow this to reach a waymark at a junction just after a footbridge.

    The catchment area of the River Camel stretches from here to Bodmin Moor.

    The River Camel runs for 30 miles from Bodmin Moor to Padstow Bay, making it the longest river in Cornwall after the Tamar.

    The River Camel is classed as a SSSI and Special Area of Conservation (SAC) under the EC Habitats Directive. The river is a breeding ground for otters, Atlantic salmon and bullhead (a small fish that looks a bit like a blenny but is more closely related to lionfish and scorpionfish).

  5. Turn right at the waymark and follow the path into another field. Once in the field, turn left to follow the waymarked path between the hedge and fence until you reach a corner in the fence on the right with a waymark.

    The vetches are a family of wildflowers that is a sub-group within the pea and bean family. Their pretty purple flowers are quite like mini sweetpea flowers. The leaves are also very distinctive, organised in a neat row either side of the stem. Common vetch is a wildflower but is also sown by farmers in some grazing fields to improve the nutrition for ruminants and to introduce more nitrogen into the soil.

    Despite their native habitat being woodland, wood pigeons are able to thrive wherever there is food. They have fared better than most birds with intensively-farmed crops and are particularly fond of oil seed rape. They are able to hoover up food quickly (up to 100 pecks per minute) and stuff large amounts into their crop (e.g. around 150 acorns!). They then digest this overnight.

  6. At the waymark, bear left through the opening and follow the waymarked path across the footbridge and through the woods to reach a gate into a field.

    Willow trees are usually found in wet places including riverbanks and waterlogged ground. Common species include grey willow and goat willow but these often hybridise so they are more often known by the more broad-brush collective term "pussy willows" (due to their catkins). In January the fluffy, grey male catkins appear and and turn bright yellow in March when they release their pollen. Then in April, the fertilised female catkins develop into woolly seeds. In early May, air can be filled with the downy seeds that look a bit like dandelion seeds.

  7. Cross the stile next to the gate and make your way into the field on the left. Bear left slightly to cross the field approximately diagonally to a stile in the hedge along the bottom of the field, roughly 50 metres from where the wire fence crosses the field.

    The term "thistle" is not biologically precise and covers quite a broad range of different plant species from the daisy family. The common thistle (also known as bull thistle or spear thistle) is appropriately the commonest in the UK. The flowers open as a green spiny ball with a purple tuft (often depicted within Scottish emblems). The creeping thistle is also common in agricultural fields and has lighter pink flowers.

    A branch line once followed the River Ruthern from Grogley Halt up to Ruthernbridge to transport stone and ore quarried in the area.

  8. Cross the stile and bear left from the walkway to pass to the left of the solar panel. Follow along the trees on your right to the bottom hedge to reach a flight of steps slightly hidden under the overhanging trees.

    Solar panels work by a particle of sunlight (photon) knocking off a charged particle (electron) from one of the chemicals in the panel, leaving behind an oppositely-charged particle missing an electron. These freed electrons can be captured by an electrode and sent on a little journey before returning to the solar panel to fill in the holes where other electrons have been knocked off by sunlight. That little journey of the electrons is what we call "electricity".

  9. Descend the steps and turn right onto the track. Follow this to join a surfaced lane and continue to reach a junction with a track.

    The settlement of Lawellen was recorded in 1518 as Lavelyn. Often, Cornish names starting with lan indicate some kind of religious enclosure such as a churchyard but in this case, the name is thought to be from the Cornish words for "valley" and "mill" (nans and melyn) with some mutation of the initial consonants. Lanteglos is another example of where the "nan" of valley is thought to be represented by "lan".

  10. Keep right to follow the lane around the bend and continue until it ends in a junction.

    Primroses grow along the lane.

    During Victorian times, the building of railways allowed primrose flowers picked in the Westcountry to be on sale in London the next day. Picking was done on a large scale but eventually became unfashionable, being seen as environmentally destructive. However all the evidence gathered suggests as long as the flowers were picked and the plants were not dug up, the practice was sustainable.

    Tarmac's name has Scottish origins. In around 1820, engineer John McAdam pioneered a road building technique using stone chippings. Roads made from such chippings were then known as "macadam" surfaces (rather than McAdam) which is the origin of the "mac".

  11. Turn left at the junction and follow it until you reach a T-junction at Withielgoose Mills.

    At the top of the hill ahead, behind Withielgoose Mills, was an open-cast tin mine (i.e. a quarry). It is one of the few places in the country where a large tin lode occurs right on the surface and the quarry is now a SSSI for the geological formations that occur there (which can normally only be seen deep underground).

  12. At the junction, turn right and follow the lane until it eventually also ends at a T-junction.

    A particularly attractive stone known as Tremore Elvan was quarried near Tremorebridge. Joseph Treffry used polished slabs of the blood-red stone to line the interior of Porphyry Hall and Queen Victoria and Prince Albert were so impressed that they had polished slabs used in Osborne House on the Isle of Wight. The star-like features on the floor in King Arthur's Great Halls in Tintagel and a large tabletop in Lanlivery church are also made from it.

  13. At the junction, turn right and follow the lane to a junction signposted to Retire.

    The Tremore River, which the road followed to the junction, is a tributary of the River Ruthern which it joins just above Ruthernbridge. It collects water from many tiny streams on Retire Common which is the area on your left for the final leg of the walk.

  14. Turn right in the direction of Retire and follow the lane past Chapel House and Chapel cottage until the lane forks.

    There were two Wesleyan Methodist chapels in Retire, both of which have now been converted to houses. The first was built in 1836 and a second, larger, chapel (now known as Chapel House) was built later in the 19th century as an upgrade to accommodate a growing congregation.

  15. Turn left and follow the lane past Retire Farm to a gateway with a path leading to the left.

    Retire is a small hamlet near Withiel. The place name Retire is more than 200 years old, but the origin of the name is unknown. In Magna Britannia in 1814, it was postulated the Domesday manor of Ritwore might be the origin of the name but this has since been attributed to Roseworthy Barton near Camborne.

  16. Turn left onto the path and follow it to a stone stile on the right.

    In Old Cornish, both bluebells and marigolds were known as lesengoc which translates to "flower of the cuckoo". In Modern Cornish, the marigold has remained more-or-less the same but the bluebell has been changed to bleujenn an gog ("plant of the cuckoo"). The association between bluebells and cuckoos exists in Welsh ("bells of the cuckoo") and Gaelic ("cuckoo's shoe"), and in some English folk names such as Cuckoo's Boots and Cuckoo Stockings. It is thought that the association is due to the time that bluebells flower coinciding with the time that the call of the cuckoo is first heard.

    Flowering plants have evolved a complex double-fertilisation process where one sperm fertilises the egg whilst a second sperm combines with other nuclei in the cell to create a nutrient-rich tissue. This gives the seed a head start so it can out-compete others (e.g. conifers which don't have this). This also allows flowering plants to produce viable seeds more quickly: whilst conifers take around 18 months to produce a new batch of seeds, many flowering plants produce a batch of seeds each year and some can produce seeds more than once a year.

  17. Cross the stile into a field. Bear left to cut across the corner of the field to a stile two thirds of the way along the hedge.

    Four iron mines operated during Victorian times along a lode running north-south past Retire, known as Wheal James, Wheal Retire, Wheal Colbiggan and Wheal Rosewarrick. Tens of thousands of tonnes of iron ore were raised from the mines. Manganese oxide as well as iron oxide was extracted from the ore.

  18. Cross the stile and cross the field to a stile in the opposite hedge (possibly with a small metal gate tied in front).

    Dandelions are dispersed very effectively by the wind. The tiny parachute-like seeds can travel around five miles. Each plant can live for about 10 years and produces several thousand seeds each year.

    Today, more than 11,000 species of grass exist around the world. In the UK, around 160 species occur. The most widely sown grasses by farmers are ryegrasses (recognisable by the alternating spaced-out "ears of corn" pattern of seeds along the stem) as these are able to take up nitrogen fertiliser efficiently and also generate high levels of sugars. On dry land, cocksfoot (recognisable from distinct tufts of seeds) is often sown as this is the most deep-rooted of the grass species.

  19. Cross the stile onto a track and the stile opposite into a field. Bear right very slightly across the field to a gateway on the right of the barn.

    An acre is a unit of area dating back to mediaeval times, based on the amount of land that could be ploughed with a yoke of oxen in one day. It was standardised in 1824 as a rectangle of 4 rods (66 feet) by one furlong (660 feet). The 10:1 "letterbox" aspect ratio comes from the long, thin field shapes in mediaeval times to minimise the awkward process of turning the oxen around. In fact the name "furlong" comes from the Old English for "one furrow long". The acre has since lost its prescribed shape and now just means 43,560 square feet.

  20. Cross the stile next to the gate and follow along the right hedge as far as a gateway half-way along. Then bear left to descend the field to reach a footbridge in the bottom-right corner of the field.

    The Ramblers Association and National Farmers Union suggest some "dos and don'ts" for walkers which we've collated with some info from the local Countryside Access Team.

    Do

    • Stop, look and listen on entering a field. Look out for any animals and watch how they are behaving, particularly bulls or cows with calves
    • Be prepared for farm animals to react to your presence, especially if you have a dog with you.
    • Try to avoid getting between cows and their calves.
    • Move quickly and quietly, and if possible walk around the herd.
    • Keep your dog close and under effective control on a lead around cows and sheep.
    • Remember to close gates behind you when walking through fields containing livestock.
    • If you and your dog feel threatened, work your way to the field boundary and quietly make your way to safety.
    • Report any dangerous incidents to the Cornwall Council Countryside Access Team - phone 0300 1234 202 for emergencies or for non-emergencies use the iWalk Cornwall app to report a footpath issue (via the menu next to the direction on the directions screen).

    Don't

    • If you are threatened by cattle, don't hang onto your dog: let it go to allow the dog to run to safety.
    • Don't put yourself at risk. Find another way around the cattle and rejoin the footpath as soon as possible.
    • Don't panic or run. Most cattle will stop before they reach you. If they follow, just walk on quietly.
  21. Cross the footbridge and stile into a field. Bear right slightly up the field to a path leading from the top hedge. Follow this path up into the field above to a waymark.

    The Saints' Way runs for 30 miles from Padstow to Fowey, and follows one of the likely routes of early Christian travellers making their way from Wales and Ireland to the Continent during the Dark Ages. Rather than risk a premature martyring on the rocks around Land's End, they would disembark their ships on the North Devon and Cornish coast and cross the peninsula, on foot, to ports on the south coast such as Fowey. The Bush Inn at Morwenstow is thought to be one of the stopovers from the North Devon ports. The route from Padstow to Fowey was in use before the Dark Ages which is evident from Roman coins found along the route. However it is thought that it was likely to have been in use even earlier still, in the Iron Age.

  22. When you reach the waymark, follow the right hedge until it ends.
  23. Continue ahead in the line of the hedge to reach a kissing gate in the corner to the left of the protruding section of hedge, left of the barns.

    Withiel is the birthplace of the cheese known as Cornish Yarg.

    Cornish Yarg is a soft cheese made from cows milk which varies in texture from creamy on the outside to crumbly towards the centre. The original version is wrapped in nettle leaves but it is now also available wrapped in wild garlic leaves. The name is the reverse of "Gray" as the cheese was originally made by a couple with this surname from Withiel, who discovered a recipe, thought to date from the 13th Century, in a dusty book in the attic. In the 1970s, the recipe was given to Lynher Dairies who now produce the cheese, still on a relatively small scale (from a single farm near Truro at the time of writing). Both versions of the cheese have won a number of British and International cheese awards. In order to comply with stringent US export standards, the US inspectors required an explanation of what stinging nettles were. We can assume that the introduction was gentler than it could have been, as the cheese is now on sale in the USA and growing in popularity.

  24. Go through the kissing gate and follow the path to some steps onto the lane.

    The church in Withiel is dedicated to St Clement and dates back to the 13th Century. The dedication (to the third Pope of Rome) is thought might be a result of one parish vicar who was previously at St Clement Danes (the RAF church on the Strand, in London). In the early 16th century, Withiel church was owned by the monastery of Bodmin but had been allowed to go to ruin. Thomas Vyvyan became rector of the church in 1523 and began to rebuild it, and it split from Bodmin monastery in 1538. Much of the main building dates from this time though by the early 19th century, the church was in a state of neglect. The church underwent a major restoration in 1819 which included the addition of the Gothic pinnacles. More recently, the church organ was restored and has its own YouTube video.

  25. Turn right onto the lane and follow it past the church and through the village to a junction with a signpost. Keep left (signposted for Wadebridge) to return to the village hall.

    As you turn the corner after the junction, you pass a house on your left called The Old Pig and Whistle.

    The Old Pig and Whistle is a house near the village hall in Withiel. As the name suggests, The Old Pig and Whistle was once the village pub. Like many old pub names such as The Dog and Duck, the derivation of The Pig and Whistle is uncertain. The term "pigs and whistles" was in common usage as early as the 1600s, meaning "odds and ends". To "go to pigs and whistles" meant to fall into ruin. The pub was eventually shut down by the parish Rector, who clearly disapproved of such ruinous activity.

Swallows have evolved a long slender body and pointed wings that makes their flight more than twice as efficient as other birds of a similar size. In flight, swallows can reach 35 mph which is particularly impressive given they weigh only 20 grams.

Swallows forage for insects on the wing, typically around 7-8 metres above the ground, but will skim over the surface of the ground if that's where the insects are. They can sometimes be seen skimming the surface of water either to drink or to bathe which they also do in flight.

The streamers on swallows tails serve an aerodynamic function, assisting tight turns to catch insects. Experiments with sand martins found that they could be "pimped-up" by adding artificial streamers to their tails which afforded them increased manoeuvrability in a flight maze. The suggestion for why swallows have evolved streamers and not sand martins is partly the speedier insects that swallows need to catch and also that sand martins live in burrows and this would risk breaking off one streamer, leading to unbalanced flight.

The length of swallows streamers has been found to be about 20% longer than the aerodynamic optimum, particularly in males which have longer tails than females. This is thought to be runaway sexual selection where a "size matters" preference of females selects for males with the longest streamers. During the period when streamers first evolved, length correlated with fitness of males. Now it has passed the optimum it has become a sexually-selected handicap like a peacock tail.

Swallows migrate to India, Arabia and Africa for the winter. Swallows cover about 200 miles in a day when they are migrating. Journeys of over 7000 miles have been recorded.

Swallows face a major weather forecasting challenge: to know when to migrate, they need to know what the temperature will be like 7,000 miles away. It is thought that swallows solve this problem by choosing locations at each end where the respective dipping and rising temperatures correlate well, so the temperature when leaving is what they can expect when they arrive.

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.

During Mediaeval times, migration wasn't understood so the vanishing of swallows in winter was a bit of a mystery. The accepted theory to explain this was therefore that swallows spent the winter buried beneath the mud of ponds and lakes!

Swallows are often found near herds of livestock where the flies that swallows catch are more numerous. It is thought that swallows were much rarer before humans started keeping animals. Consequently, the rise of veganism is not good news for swallows - a decline in dairy farming and increase in arable will inevitably result in their decline.

Swallows are known by the name "barn swallow" due to their preference for nesting in man-made structures open to the elements such as stables or under bridges. Before these were available, swallows used to nest in caves and on cliff faces but they now nest almost exclusively on man-made structures. In the case of barns, these are conveniently located near insects associated with livestock. They may also be using presence of humans to help keep predators away.

In areas where ospreys are common, swallows will nest below an osprey nest and form a cooperative relationship where the swallows warn the osprey of nest raiders and the ospreys drive away other birds of prey that eat swallows. The osprey became extinct in England and Wales during Victorian times due to egg collecting but through a combination of reintroduction from Scotland and natural recolonisation from Scandinavia, ospreys are gradually returning. They are regular visitors to West Cornwall and are most likely to be seen on big lakes or estuaries in April or September.

The ferns with solid leaves are appropriately called hart's tongue as the leaf resembles the tongue of a deer. It is the only native species of fern that doesn't have divided leaves. The Latin name for the species means "centipede" as the underside of the leaves have rows of brown spore cases that form a pattern resembling centipede legs.

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.

For such a widespread tree, the oak is surprisingly inefficient at reproducing naturally. It can take 50 years before the tree has its first crop of acorns and even then, the overwhelming majority of the acorns that it drops are eaten by animals or simply rot on the ground. Squirrels play an important part by burying acorns and occasionally forgetting a few which have a much better chance of growing than on the surface.

The older an oak tree becomes, the more acorns it produces. A 70-80 year old tree can produce thousands. Acorns are high in carbohydrates and as well as being a staple food for squirrels, they are also a really important food for deer and make up a quarter of their diet in the autumn.

Tannins are natural preservatives. The reason why red wine keeps much longer than white is that the grape skins that give the red colour also contain tannins. Oak leaves, wood and acorns all contain a high level of tannins. When wine is aged in oak, the wooden barrels release more preservative tannins into their contents.

The (leather) "tanning" process got its name as it involved extracting the tannins from acorns or oak bark and soaking these into animal hides over 1-2 years to preserve them. From the brown oak juice containing the tannins, the colour "tan" was named and from this the expression "sun tan" arose.

The high levels of tannins in oak make large amounts of oak leaves or acorns poisonous to cattle, horses, sheep, and even goats, but not to pigs as they were domesticated from wild boar which were adapted to foraging in the oak forests, like deer. Acorns were also eaten by people in times of famine. The acorns were soaked in water first to leech out the bitter tannins and could then be made into flour.

Wood from the oak has a lower density than water (so it floats) but has a great strength and hardness, and is very resistant to insect and fungal attack because of its high tannin content. This made it perfect for shipbuilding.

Oak was often associated with the gods of thunder as it was often split by lightning, probably because an oak is often the tallest tree in the area. Oak was also the sacred wood burnt by the druids for their mid-summer sacrifice.

The jay is a member of the crow family recognisable by the flash of electric blue on their otherwise brown body. Their natural habitat is woodland, particularly oak.

Like squirrels, jays collect and bury acorns as a winter food store. Once jays were the main means by which oaks colonised new locations as a population of 65 jays can bury (but not always find again afterwards) half a million acorns in a month. Jays prefer to bury their acorns in open ground which is an ideal spot for a new oak tree.

Water pepper, as the name implies, grows on wet ground such as on the margins of lakes (it's also known as marsh pepper). It's relatively late to appear, not really getting going until June.

Another of water pepper's common names is "smartarse". As Emma Gunn points out in her foraging book "Never Mind the Burdocks", this is nothing to do with being clever: in the past, the dried leaves were added to bedding to drive away fleas etc. and the name comes from rolling over on a leaf in the wrong way.

Water pepper leaves can be used as a herb and has a lemony flavour similar to sorrel followed by heat which is a little like chilli. Its used in Japanese cuisine, particularly with fish. The young shoots are used to garnish sushi or sashimi.

The plant is unpalatable to livestock but is eaten by some insects which has given rise to a Japanese saying which transliterates to "Some insects eat water pepper and like it" but is used more like "There's no accounting for taste".