Henry Yevele (c. 1320 – 1400) was the most prolific and successful master mason active in late medieval England. The first document relating to him is dated 3 December 1353, when he purchased the freedom of London. In February 1356 he was sufficiently well known as a mason that he was chosen as one of a commission of six cutting masons who were to inform the mayor and aldermen about the acts and articles of the craft. Career His first connection with royal building works was probably when he was contracted from March 1357 to September 1359 to remodel the Black Prince's manor at Kennington, at the cost of £221 4s. 7d. On 23 June 1360, he was appointed "disposer" of the royal works at the Palace of Westminster and the Tower of London. For this he was paid 1s. per day, although he continued undertaking other, non-royal, commissions. At the Palace of Westminster, Yevele was responsible for refacing Westminster Hall, and for two essentially utilitarian buildings, the Jewel Tower in the Privy Palace (1365–6) and the clock tower (now destroyed), which stood opposite the north door of Westminster Hall and regulated the sittings of the royal courts of justice there (1366–7). At the Tower of London, Yevele was responsible for the Bloody Tower, while several minor works, including the vaulting of the thirteenth-century watergate, were performed by Henry's brother, Robert. The real focus of activity in the king's works at this time, however, was Windsor Castle. The master mason there, John Sponlee (d. 1382?), walked in the funeral procession of Queen Philippa in 1369 as an esquire of greater estate, whereas Yevele ranked only as a lesser esquire. During Edward III's reign Yevele's strictly architectural work for the crown was, with one minor exception, confined to London, but he supplied materials to numerous royal building sites in Kent and Surrey as well as in London. The most significant of Yevele's remaining works are the naves of Westminster Abbey (1362) and Canterbury Cathedral (1377–1400), the latter completed in an early Perpendicular Gothic style. Yevele advised on repairs and new works at the castles of Southampton (1378–9), Carisbrooke (1380–85), Winchester (1390–1400), and Portchester (1384–5), and on the town walls of Canterbury (1385–6), but it is uncertain to what extent this involved him in major design work. In 1381, 1389, and 1393 Yevele's advice was sought by William of Wykeham, bishop of