Holt, Denbigshire : The works-depôt of the twentieth legion at Castle Lyons.

von Grimes, William Francis 1905-1989
Y Cymmrodor 41
London : Society of Cymmrodorion, 1930.
Umfang/Format: 235 S. : Abb. ; 23 cm.

Segontium and the Roman occupation of Wales.

von Wheeler, Mortimer, 1890-1976
London : Honourable Society of Cymmrodorion, 1924.
Umfang/Format: 186 S. : Abb. Taf. ; 23 cm.

Y Cymmrodor.