In the 15th century, the castle's bailey was subdivided by a long wall, and the high tower on top of the keep was turned into an additional prison building. Launceston played little part in the dynastic Wars of the Roses that broke out after 1455; the castle was given to the Yorkist favourite Halnatheus Malyverer in 1484, but Henry VII's victory the following year saw him replaced by Sir Richard Edgcumbe. After Edgcumbes death in 1489 his son Piers Edgecumbe took over as constable for life. When the antiquarian John Leland visited in 1539, he noted that the castle was "the strongest, though not the biggest", he had ever seen, but the only buildings he noted were the chapel and the great hall, which was then being used for assize and court sessions.