William de Berkeley, 1st Marquess of Berkeley William de Berkeley, 1st Marquess of Berkeley William de Berkeley, 1st Marquess of Berkeley (1426 – 14 February 1492) was an English peer, given the epithet "The Waste-All" by the family biographer and steward John Smyth of Nibley. He was buried at "St. Augustine's Friars, London" according to one source, but most likely in the Berkeley family foundation of St Augustine's Abbey, Bristol. William of Berkley was born to James Berkeley, 1st Baron Berkeley, and Lady Isabel Mowbray at Berkeley Castle in Berkeley, Gloucestershire, in 1426. His first marriage was in 1466 to Elizabeth West, daughter of Reginald West, 6th
Berkeley Castle before returning him to Berkeley Castle in September. Some commentators have claimed that Edward's escape was actually successful, and that someone else was later murdered in his place. Historical sources record that Edward was murdered there on 21 September 1327. Raphael Holinshed's "Chronicles" (1587 edition), drawing on earlier sources, describes Edward's murder in detail:they [the murderers] came suddenlie one night into the chamber where he laie in bed fast asléepe, and with heauie featherbeds or a table (as some [sources] write) being cast vpon him, they kept him down and withall put into his fundament [i.e., his anus] an horne,