Wells (bishop’s palace). Davis, C. E. (Journal British Archaeol. Assoc., xiii. 177-86).
Wingfield. Cox, J. C. (Derbyshire Archaeol. Soc., viii. 65-78).
—— Edmunds, W. H. Guide to Wingfield Manor.
York. Clark, ii. 534-48 (The Defences of York).
—— Cooper, T. P. York, The Story of its Walls and Castles. London, 1904.
—— —— The Castle of York. London, 1912.
Yorkshire Castles. Thompson, A. Hamilton. The Castles of Yorkshire (Memorials of Old Yorkshire, 1909, pp. 236-64).
MILITARY ARCHITECTURE IN ENGLAND DURING THE MIDDLE AGES