Bruce I am just starting to re-research this family and think the ancestry you list prior to Ephraim and Mary Ann Hill is incorrect.
The headstone I sent you lists Ephraim being born Dec 02, 1804.I could not find this birth but did find one for Dec 02, 1803.See my notes below
Holden Vital Records
Children of Ephraim and Anner Clark 1799 d. 1800 Holden Elisabeth 1795 Ephraim Dec 02, 1803 (headstone says Dec 02, 1804) Nathan 1801 Rhoda 1796
Children of Benjamin and Elizabeth (Belknap) b. 1739 Framinghamm 1757 Holden, MA dau of Jedidiah and Deborah (Streeter) Benjamin 1768 Elizabeth 1761 d1765 Holden Elizabeth 1766 Ephraim 1772 m. Anna (Rogers) 1794 Holden, MA Eunice 1763 Mary 1774 Patty 1776 Persis 1781