Note 2 — Chapter X · Difficulties of the Folklorist
Reading edition
This may have meant the ‘Blue Slate or Flagstone’; but there is no telling so long as the place is not identified. It may have been in the Pictish district of Galloway, or else somewhere beyond the Forth. Query whether it was the same place as Ỻech Gelyđon in Prydyn, mentioned in Boneđ y Saint: see the Myvyrian Archaiology, ii. 49. ↑