'The names of John Butterworth's sixth, seventh, eighth and ninth children are illegible upon the town records. These children were born Sept. 8, 1661, Jan. 22, 1663, March 1665, May 1667. John Butterworth and wife Sarah had :
... Mary [implied to be one of the children whose name is illegible in the town records], m. first Joseph Slade, Nov. 12, 1681; m. second Samuel Thayer.'