PERILOUS CASTLE

Tristram, Gouvernail, Sir Kehydius, and Dame Bragwaine were on their way by boat from Brittany to Cornwall when an extremely "contrarious wind" blew them off course to North Wales, where they came ashore near the Castle Perilous. Tristram went into the forest because "in this forest are many strange adventures, as I heard say".

This would seem to put it near the Forest Perilous of Annowre the sorceress in North Wales. I would incline to put this Castle Perilous at Dyffryn or Llanbedr, above Barmouth on the coast of Merioneth County. Having blown so far, though, it would not be impossible for Tristram and party to have come ashore even farther along the coast, at, say, Llandudno or Rhyl.

Although I cannot be entirely sure, I do not think this is the same castle as Dame Lyonors' Castle Perilous, otherwise called Castle Dangerous - and not simply because I have already located that Castle Perilous in Wiltshire!