What type of surety was the Earl of Pembroke who participated in the battle at Lincoln castle in 1217?
Battle of Lincoln (1217) The Second Battle of Lincoln occurred at Lincoln Castle on Saturday 20 May 1217, during the First Barons' War, between the forces of the future Louis VIII of France and those of King Henry III of England. Louis's forces were attacked by a relief force under the command of William Marshal, 1st Earl of Pembroke. Thomas, the Comte du Perche, commanding the French troops, was killed and Louis was expelled from his base in the southeast of England. The looting that took place afterwards is known as the "Lincoln Fair". The citizens of Lincoln were loyal to Louis so Henry's forces sacked the city.
Isabel de Forz, suo jure 8th Countess of Devon Isabel de Forz (Latinized as Isabella de Fortibus) (July 1237 – 10 November 1293) was the eldest daughter of Baldwin de Redvers, 6th Earl of Devon (1217–1245). On the death of her brother Baldwin de Redvers, 7th Earl of Devon in 1262 without children, she inherited "suo jure" (in her own right) the earldom and also the feudal barony of Plympton in Devon, and the Lordship of the Isle of Wight. After the early death of her husband and her brother before she was thirty years old, she inherited their estates and became one of the richest women in England, living mainly in Carisbrooke Castle on the Isle of Wight, which she held from the king as tenant-in-chief.