"John (Jackson), carpenter, Boston, frm May 10, 1643. Wife Abigail adm chh 12 (7) 1640 [September 12, 1640]. [She d and he m 14 (9) 1657 [November 14, 1657], Jane, dau. of Evan Thomas.] Ch. of John and Abigail Sarah b. 15 (6) 1639 [August 15, 1639], Abigail b 24 (6) 1641 [August 24, 1641], John b 20 (4) 1643 [June 20, 1643], Hannah b 2 (5) 1645 [July 2, 1645], Peter bapt 12 (7) 1647 September 12, 1647], d 5 (9) 1653 [November 5, 1653], Mary bapt 4 (9) 1649 [November 4, 1649], ae about 10 days, Benjamin bapt 23 (12) 1650 [February 12, 1650/51], d 11 (9) 1653 [November 11, 1653], Mary bapt. 25 Oct, 1652, [Sarah bapt 31 Oct. 1652, ch of John and Jane John b and d 1658, John b. Feb 24, 1662]. He deposed to admin. of Thomas Millard in 1669-70, ae about 60 years; Abigail deposed, ae. same. Will dated 10 Dec. prob 29 Jan 1672. Wife Abigail, son John, dau Sara Eustace, youngest dau Mary, working tools to grand child John Eustace."
Based on the text of this sketch, it appears that (1) the marriage of Jane Thomas to John Jackson was to a different John Jackson [wife named Abigail in 1672 will]; (2) the second Sarah (baptized 1652), was daughter of a different John Jackson [the first Sarah, b. 1639, was living in 1652, age 13].