A writ de escaeta issued regarding Isabel Basset on 26 November, resulted in an Inquisition taken on the Friday after St Lucy in 45 Henry III, in Southhampton, which found that Grewell manor was given by Henry III to Gilbert Marescall, who then gave the manor to Gilbert and Isabel Basset, and the heirs of their bodies, but there was no heir left, and Isabel was dead, so the manor was in the king's hand again; another Inquisition was held in Wiltshire which found that Isabel held Mildehal manor in free marriage of the gift of her father, Sir William de Ferers; and another Inquisition in Southhampton revealed that Grewell manor was the ancient demesne of King Henry, the king's grandfather, and he gave it to Juliana de Aquila, mother of Gilbert de Aquila.
Royal Ancestry D. Richardson 2013 Vol. IV p. 100-101
Reynold de Mohun married, 2ndly, in or before 1243, Isabel, the childless widow of Sir Gilbert BASSET, and daughter of William (DE FERRERS), EARL OF DERBY, by his 1st wife (to whom she was coheir), Sibyl, daughter and eventually coheir of
William (MARSHAL), EARL OF PEMBROKE. He died 20 January 1257/8, at Tor Mohun in Devon, and was buried at Newenham in front of the high altar, on the left-hand side.
[Complete Peerage IX:20, XIV:478
Note: Title: The Magna Charta Sureties 1215, Frederick Lewis Weis, additions by Walter Lee Sheppard Jr, 5th Edition, 1999
Note: Page: 149a-3
Note: Title: Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Ltd, 2000
Note: Page: IX:20
Note: Title: Ancestral Roots of Certain American Colonists, 7th Edition, by Frederick Lewis Weis, additions by Walter Lee Shippard Jr., 1999