I don't know if I can add to the tree but I found Peter living in Illinois census in 1850. He is married to Caroline 30 born in NY Has a daughter Sarah 1 born in Canada and son Simon 1 born in Canada. He is also living next to a Bartlett Simon 33 Born in Canada His wife is Catherine 30 born in NY and a daughter Julia 5 Born in Wis. I beleive they could be brothers who maybe married sister not sure if you. I also don't know where the daughter went or Caroline in the 1860 census. In 1870 she is back and the daughter I think died. If you have and information on the marriage of Peter and caroline it would be helpfull.