Note 22 — LETTER IV.
Reading edition
"He was son of Osborne de Bolebec and Aveline his wife, sister to Gunnora, Duchess of Normandy, great-grandmother to the Conqueror, and was one of the principal persons who composed the general survey of the realm, especially for the county of Worcester. In 1089 he adhered to William Rufus, against his brother Robert Courthose, and forfeited his Norman possessions on the king's behalf, of whose army there he was a principal commander, and behaved himself very honorably. Yet, in the time of Henry Ist, he took the part of the said Courthose against that king, but died the year following,"—Banks' Extinct Baronagé, III. p. 108.