Disgrifiad
Treval Marching Camp; Undated report entitled "A Probable Roman Marching Camp near Nantmel, Radnorshire" by David Browne & Dr A.H.A. Hogg, accompanied by drawings, field notes, sketches, annotated xeroxes of aerial photographs and a single aerial photograph.
Cyfrwng
Cartographic, Photo, Text, Graphic.
