 The provincial court system was set up in January 1693, with the Superior Court of Judicature, the province's high court, hearing the remaining witchcraft cases.Corwin's own mother-in-law, Margaret Sheaf Thacher (née Webb; born 1625, Boston, to Henry and Dorabell (née Smith) Webb — died February 23, 1694, Boston), was accused of witchcraft by her servant, Mercy Short.Thacher held extensive holdings in Boston, including her home and acreage which was next to Governor William Phips' house.