What type of surety was the Earl of Pembroke who participated in the battle at Lincoln castle in 1217?
William Marshal, 2nd Earl of Pembroke William Marshal, 2nd Earl of Pembroke (French:"Guillaume") (1190 – 6 April 1231) was a medieval English nobleman and was one of Magna Carta sureties. He fought during the First Barons' War and was present at the Battle of Lincoln (1217).
L'Histoire de Guillaume le Marechal L'Histoire de Guillaume le Marechal (English:"The History of William Marshal") is the verse biography of William Marshal, 1st Earl of Pembroke (1146 or 1147 – 14 May 1219), written shortly after his death at the request of his son, William Marshal, 2nd Earl of Pembroke. The biography is composed of 19,214 lines, in rhyming octosyllabic couplets, and was written in the Anglo-Norman language. It is the major extant text documenting Marshal's life. It was written based on the surviving account of his squire John D'Erlay. It can be used to provide insight into the two English kings, Richard I and his successor John, both of whom William served. The single surviving manuscript of the work, dating perhaps from the second quarter of the thirteenth century, was once in the collection of Sir Thomas Phillipps, and is now housed at the Pierpont Morgan Library in New York City, under the catalog number M888.