timber, roofed with oak shingles, some of a large description, such as a banqueting hall; but the habitations of the garrison were circular, of wicker-work, and thatched with rushes.
In Cornwall there is Dingerrein, the dinas of S. Geraint; Castel-an-Dinas; Damelioc (Din-Maeloc); Dunheved, the old name for Launceston; Dundagel.
4. I come now to the stone fortresses that are found in parts of Cornwall and Wales. They are also to be seen in Scotland and Ireland. These are called caerau in Wales. A cathair is the term applied to them in Ireland, and cathair signifies as well a city.
They are found in England only in Somersetshire, Devon, and Cornwall; and in Wales only in such parts as were invaded and occupied from Ireland.
In Kerry and the isles of Arran are those in best preservation, and from these we can see that the walls were regularly built up with double faces, rubble being between them. Very usually in Arran stones are placed with the end outwards, so that they serve as ties to hold the walls together.
The Welsh examples are very perfect, and precisely similar to those in Ireland.
We know that the Gauls built stone camps—Cæsar calls them their oppida—but they employed beams of timber along with the stone to tie the walls together. The wood has everywhere rotted away, and the enclosing walls of the Gaulish camps now present the same appearance precisely as do the similar stone camps in Devon, Somerset, and Cornwall. When the timber decayed the stones fell into heaps. In Arran and Anglesey there was no timber; conse-
