"under the hand and seal of Governor Shirley"

Portrait of William Shirley (1750)
Public DomainPortrait of William Shirley (1750) - Credit: Thomas Hudson
William Shirley (1694-1771) was the longest-serving governor of the Province of Massachusetts Bay, holding post from 1741-9 and then again from 1753-9.    

William Shirley's hand
Public DomainWilliam Shirley's hand - Credit: William Shirley