Dictionary of National Biography, 1885-1900/Haseley, William de
HASELEY, WILLIAM de (fl. 1266), a monk of Westminster, 'magister novitorum,' and finally sub-prior there, compiled, at the request of Richard de la Ware, abbot of Westminster, in 1266 the 'Consuetudinarium Monachorum Westmonasteriensium,' part of which is extant among the Cotton. MSS. (Otho C. xi.) On 3 May 1283 Hugh Balsham (or Belesale), then bishop of Ely, granted an indulgence of twenty days to all persons visiting Westminster Abbey and praying at Haseley's tomb. A copy of the indulgence is among the muniments of Westminster Abbey (Hist. MSS. Comm. 4th Rep. p. 183).
[Tanner's Bibl. Brit.]