Marriage allegation describes her as "Mary Draper of Hackney in the County of Middlesex, a maiden, aged about 22 years and at the dispose of George Harwood of London, merchant, her uncle." [Bishop of London Marriage Allegations, volume 13, 1629-1631, folio 49v]. Annotations on the Salem church member list indicate that she probably died in the mid-1650s (and William's first child with his second wife was born about 1658).
