Walker 1966, p. 39 Walker, John William (1966) [Originally printed by The West Yorkshire (i.e. Yorkshire) Printing Co Limited, Wakefield, Privately printed 1939]. Wakefield its History and People. Vol. 1&2. New preface of Vol. 2 by H. Milnes Walker (3rd ed.). Wakefield: S.R. Publishers. OCLC155230198.
Walker 1966, p. 42 Walker, John William (1966) [Originally printed by The West Yorkshire (i.e. Yorkshire) Printing Co Limited, Wakefield, Privately printed 1939]. Wakefield its History and People. Vol. 1&2. New preface of Vol. 2 by H. Milnes Walker (3rd ed.). Wakefield: S.R. Publishers. OCLC155230198.
Butler 1991, p. 19 Butler, Lawrence AS (1991). Sandal Castle, Wakefield: the history and archaeology of a medieval castle. Wakefield Historical Publications, 30. Wakefield, West Yorkshire: Wakefield Historical Publications. ISBN9780901869319. OCLC26361664.
Walker 1966, p. 105 Walker, John William (1966) [Originally printed by The West Yorkshire (i.e. Yorkshire) Printing Co Limited, Wakefield, Privately printed 1939]. Wakefield its History and People. Vol. 1&2. New preface of Vol. 2 by H. Milnes Walker (3rd ed.). Wakefield: S.R. Publishers. OCLC155230198.
