Disgrifiad
Hen Gaer, Tirymynach, Ceredigion; collection of material comprising black and white negatives; black and white contact prints; administrative notes by C.H. Houlder; original measured drawings(comprising sketch section, and finished plan and section) by C.H. Houlder; location map; extract from a thesis prepared by J. Wyn Evans; and a postcard by C.H. Houlder showing sketch plan.
Cofnod Casglu
CHH - C.H. Houlder Collection
Cyfrwng
Text, Photo, Cartographic.
Cychwynnwr
J. Wyn Evans, Christopher H. Houlder, RCAHMW
