In July 1364 Master was granted a royal licence to ship wool from Ipswich to Spain and Gascony and to bring back wine and other merchandise in return. In later years he is recorded as trading in cloth as well.
Master’s property at Ipswich was not confined to any one parish. With his wife, Alice, he acquired various holdings in the town in 1370, and five years later they received other properties from William’s kinsman, John, son of Thomas Master (the Ipswich MP of 1357). In 1378 Master obtained more premises in St. Mary’s and St. Mildred’s parishes.
At the Ipswich elections to the Parliament of 1399 Master acted as mainpernor for John Lewe, a fellow townsman. He may have been the ‘mercer of Suffolk’ who stood bail in February and August 1401 for Thomas Master, a clerk arrested for rape and abduction. He died before April 1406 when his son, John, conveyed to Robert Andrew I and William Debenham II his tenements in St. Mary’s parish.
