Yep, 1850+ good, 1840- bad. Well, I can prove my one female ancestor was widowed before 1830 because she is head of household on that census, but I've looked at lots and lots of the early ones and that's all I got. Oh, there was another guy with the same first+last name as one of my ancestors in a neighboring Kentucky county in 1810 (because two records, two grave markers, two different death years, two sets of wives and children...), so I sent a major correction to a FindAGrave Profile manager and some persons that were blindly merging away. Told 'em to get off my lawn. That's about it.