Have you located parents for Henry Abbott? My ancestors, William and Betsy [Lindsay] Abbott lived just a few miles north of Canaan in the tiny town of Mill River, New Marlborough, Berkshire, MA, where Bill ran a mill. Town records show children born to them in 1811, 1818, 1821 & 1823. That is a fair sized gap in a time of no birth control. I wonder if your Henry might fit into there? A bit of circumstantial evidence that further suggests this is that their daughter Mary Wilder, b. 1818, named her first son Henry. Henry D. Clemons, b. 1841, appears to lived much of his childhood with his grandparents, staying on after his parents moved to CT. I have also seen records in Canaan of Jere Abbott, brother of William. He m. Sarah Sizer; I know of 6 of their children b. between 1812 and 1820. I can't place my source, but I seem to recall that they migrated west.