Doug, Good to hear from you. That is quite a tree you've got going there. I am just noodling around at the moment. If I get enough documentation, I might join the SAR.
Just talked to my Mom and she has a photo of Jonas. Also, your records show his daughter as Harriet Emma Bartlett, but my mom's records show her as Emma Harriet Bartlett. Also, it appears that the birthdates disagree by exactly one year. Mom says she was born22 Dec 1842. She also hasphotos of Emma and a whole slew of photos of Leander from childhood onwards. I will try to get her to loan them to me and scan them in. She still believes that Jonas is the GGSon of Josiah, but your records seem to indicate otherwise and look pretty official.Apparantly, Josiah was somehow inserted into our tree in error about 100 years ago.