After a frustrating half-hour or so trying to establish which of the many paths available actually led somewhere (most ended up in a miniature gorse forest - I really have seen enough of that particular shrub this week!), I found the line of the boundary again, more or less south of Carn Galva, in an area where a body called Natural England (doubly ironic!) seemed to be doing their best to turn the moors into a replica of the Western Front.
