If this is your family, or Thomas and Mary Cook of York Co.,PA, I have their familes for you if you don't already have them. Peter Cook born ca. 1700, and wife Sarah born ca. 1706 children were: Joseph, Ruth, Lydia, Hannah, Samuel, Ann, George, Jesse, Sarah, and Peter. The children of Thomas and Mary Cook were Jacob, Mary, and Thomas. Their record is found in the Orphans Court abs. York Co.,PA. dated 11 June 1753.