David - I believe part of Henry County used to be in Knox so it gets confusing, they border each other. So it looks like Mary probably died between 1860-1870 based on the fact she was with James in 1860 but not in 1870. I'm going to check with the state on Monday to see if a death certificate exists. I will purchase one if so. Many of the Manx people landed in a small town called Brimfield and there is a cemetery there but they have no records for the old section. I will check all cemeteries in Lynn Township area. Thanks once again! Michael