Research Notes:
Richardson states, [1]
Margaret, wife of Roger la Zouche, was doubtless the daughter of Henry Biset (died 1208), of Kidderminster, Worcestershire and Rockbourne, Hampshire, by an unknown 1st wife. Margaret evidently had a substantial maritagium on her marriage. In 1220 the king specifically reserved to her both her maritagium and dower, at the time her husband, Roger la Zouche, was going on a pilgrimage to Santiago in Spain [see C.P.R. 1216-1225 (1901):246 (" ... salvis Margarete uxori ipsius Rogeri maritagio et dote sua." Margaret's maritagium appears to have included the manor of North Tidworth, Wiltshire, a known Biset family property. Sometime in the period, 1199-1227, Margaret joined with her husband, Roger la Zouche, in granting a virgate of land in North Tidworth to maiden Bradley Priory in Wiltshire [see Hatton Books of Seals (1951): 128-129; VCH Wiltshire 3 (1956): 296]. Maiden Bradley Priory was a hospital for leper women, and was founded in 1164 by Henry Biset's father, Manasser Biset, steward [dapifer] of King Henry II [see VCH Wiltshire 3 (1956): 295-302; Notes and Queries 10th ser. 2 (1904): 69-70].
[1] Douglas Richardson and Kimball G. Everingham, Magna Carta Ancestry: A Study in Colonial and Medieval Families, 2nd editon, 4 vols. (Douglas Richardson, 2011), 1:413, [GoogleBooks].