Country diary: ancient enclave where walkers usually roam

Cadson Bury, Lynher Valley: Early farmers and their animals were protected from marauders and wild creatures lurking in the dense woodland below

Just below the summit a shaggy-coated cow with long, curving horns gazes into the greyness of this dull afternoon. The sound of rushing water carries up from the river, now swollen with run-off from Redmoor and Tresellern Marshes, the Withey Brook and other boggy headstreams on the eastern side of Bodmin Moor, as well as little tributaries from intermediate waterlogged land.

Up here, on this precipitous hill, topped with defensive earthworks of ditch and rampart, a dozen or so highland cattle of varying age (owned by the Crago family of the nearby Cadson Farm) mooch about, graze and thrive on heather and the coarser vegetation that would otherwise smother this iron age hill-fort and the adjoining hillside. Yellow gorse flowers and the silver bark of birch gleam in the murk and, below, in the Lynher Valley and on the Newton Ferrers estate, the leafless tree canopy (dominated by lichen-encrusted alder and oak) is tinged pale green and purple. Inside the eastern entrance, the encampment of some six acres is a spongy oval space of trampled bracken and mossy turf. This enclave was once a secure area for early farmers, where they and their animals were relatively protected from marauders and wild creatures lurking in the dense woodland below.