Note 1148 — Chapter XII · STONE CASTLES OF THE NORMAN PERIOD
Reading edition
The keep of Caen, which was square, was demolished in 1793. De Caumont, Cours d’Antiquités, v., 231. The keep of Alençon is also destroyed. There are fragments of castles at Argentan, Exmes, and St Jean-le-Thomas. The keep of Vernon or Vernonnet is embedded in a factory. Guide Joanne, p. 6.