Thanks for getting in touch. I'm looking for James Rust, my gg grandfather who claims on the 1850 and 1900 censuses (among others) that he was born in Illinois, and that his parents were born in New York. I think one census says his mother was born in Vermont. I'm particularly eagr to find his parents. One possible set of candidates is from the 1880 census-- a man called D.R. Rust, along with his wife Mary, who was born in Vermont. She couldn't be James's mother, since she is too close in age to him. They were living in Dunleith, Co Jo Daviess. But otherwise I haven't found any reference to them, and I don't know what the D.R. stands for!
James himself was in Texas in 1850 (aged 21 years), then next in CA in the San Diego area, where he married my gg grandmother, Esperanza Soto in 1863. He died in San Diego in 1901. His marriage record refers to him as Carcy Rust--obviously a nickname.
I don't see these names on your tree, though I suppose they might still belong to the same extended family, and might explain why they moved to Illinois from New York. Does your family have New York roots?