Note 875 — Chapter VIII · MOTTE-CASTLES IN NORTH WALES
Reading edition
Pipe Roll, 1159-1160. £4, 3s. 4d. paid to Roger de Powys “ad custodiam castelli de Dernio”; “In munitione turris de Dermant £6, 4s. 0d.” It cannot be doubted that these two names mean the same place.