Robert, I located George (1814-1892)Cheeseman in the "History of Carroll County, Illinois: containing a history of the county..." c1878. There is very short biographical sketches for George, indicating he came to Carroll County, Illinois in 1858.
George was married to Caroline Fowle, and had 10 living children: Alfred (named for my gr/grandfather?), George, Caroline, Robert, Joseph, Elizabeth, Henry, Elijah, Esther and Charles.
George (1814) and Robert (1819) are both in the 1870 U.S. Federal Census for Carroll County. But not in the 1850 U.S. Federal Census for Illinois that I can locate.
I am descendent from Alfred's son Robert D. Cheeseman's daughter Ellen Jane Cheeseman Cable.
Cable, Cribbs, Kammary, Cheeseman