Irish and Welsh legend combine in viewing it at times as situated on distant islands, and Welsh folk-lore contains several suggestions of another world situated beneath the waters of a lake, a river, or a sea.

In one or two passages also of Welsh mediaeval poetry the shades are represented as wandering in the woods of Caledonia (Coed Celyddon).

This was no doubt a traditional idea in those families that migrated to Wales in post- Roman times from Strathclyde.

To those who puzzled over the fate of the souls of the dead the idea of their re-birth was a very natural solution, and Mr.Alfred Nutt, in his _Voyage of Bran_, has called attention to the occurrence of this idea in Irish legend.

It does not follow, however, that the souls of all men would enjoy the privilege of this re-birth.