1. Seal CLXVIII.118 Reference (shelfmark): Seal CLXVIII.118 Title: Scope & Content: Isabel de Clare, Countess of Pembroke and widow of William Marshall, Earl of Pembroke (see G. E. C., Complete Peerage, vi, p. 198 note c), 1219. (10183) Isabel de Clare, widow of William Marshall, Earl of Pembroke: Seal: 1219. Collection Area: Western Manuscripts Languages: English Date Range: 20th century Extent: 1 item