From the earliest record of the Society of Friends on Long Island: "The children of James and Sarah Cock, borne Killingworth ... Martha Cock was borne ye 13th of ye 12th Mo., 1680." [13 Feb 1680/81] [p. 19] Died Germantown, now Philadelphia, PA, 25/9 mo (Nov) 1750, m. Killingworth abt. 1708 Isaac Davis or Deaves.