The most interesting thing I’ve got is a gg-grandfather’s civil war pension file. My mom’s cousin said he’d gone missing for some time and it just wasn’t talked about in the family. That pension file was one of the best $75 I ever spent. There are tons of affidavits in it regarding his disappearance and mental health.
According to the affidavits, he would often say he was going to leave the family, then go to town or whatever and come back. One day, he just said he was going to town for tobacco (really) and never came back. Some neighbors saw him a few months later at a fair a ways a way and that was the last anyone saw of him. After X number of years his wife filed for a widow’s pension and that’s how all this information came to be documented. There’s an affidavit from his brother’s widow saying his brother said he should have left her years before he did. Stuff from neighbors who knew the family back in Indiana saying his mother and two of her brothers were insane (which led me to find out his sister hanged herself at an asylum in Indiana and his mother wandered out of the house one night and was found dead in the orchard the next morning). Lots of juicy stuff.
14 years after he disappeared he sent a letter to his brother in Oklahoma. Brother has died but has the same name as gg-grandfather’s son, and the letter makes its way to the son in Kansas. Turns out gg-grandfather was living in the old soldier’s home in Indiana at that time. So after the truth came out there’s a letter in the file basically de-briefing him to make sure he is who he says he is, so it says all the towns he lived in all those years, what he’d done for work, where all his brothers and sisters live, etc.
After the family found out he was alive he went back to Kansas to live with them for a few years, then took off for the soldiers home in Leavenworth where he died some years later. My great-aunt (100 years old) remembers him churning butter on the porch.