Note 13 — Chapter I · JOURNEY THROUGH HEREFORD AND RADNOR
Reading edition
Cruker Castle. The corresponding distance between Old and New Radnor evidently places this castle at Old Radnor, which was anciently called Pen-y-craig, Pencraig, or Pen-crûg, from its situation on a rocky eminence. Cruker is a corruption, probably, from Crûg-caerau, the mount, or height, of the fortifications.