Source: George Morton of Plymouth Colony and some of his descendants, by John K. Allen, 49-51 North Jefferson Street, Chicago, Illinois, Rec'd. Dec. 18, 1986. Page 25. "29. Nathaniel Morton 4, (Eleazer 3, Ephraim 2, George 1). born Aug. 24, 1695, at Plymouth, Mass.; m. ___, 1720, Rebecca Clark Ellis, widow of Mordecai Ellis, and dau. of Thomas Clark, b. Plymouth, June 21, 1698, d. in Sandwich; he was lost at sea bout 1727. She married for her third husband a Mr. Swift, of Sandwich." "There were six children born to Nathaniel Morton and Rebecca Clark Ellis, as follows: i. John, b. Oct.17, 1784. ii. Eleazer, b. Aug. 1, 1786. iii. Ambrose, b. Aug. 12, 1788. iv. Sarah, b. Apr. 16, 1790. v. Joel, b. Nov. 9, 1791 and vi. Lovell, b. Nov. 9, 1791."

Note spelling of Clark by Morton family. Col. Harry H. Ellis, seemed to stick with Clarke.