Nonetheless, in 1818, President James Monroe gave "James Clarke" a bounty land grant for a 160 acre property in Illinois. He and his wife Anne sold it off to Eli Lord of New York in 1821 (who held it until 1837, and Eli was living in NY when he sold it off to Jonathan Price).
Now, when James sold his patented land to Eli Lord, James was living in East Haddam, CT. It's unclear whether he ever went to Illinois to live at (or even see) the property. The family appears on the 1820 Census of East Haddam, so I think it's unlikely that they ever did go out there.
According to family legend, though, James and Anne had gone to live at the property in Quincy, and left the kids behind in East Haddam with their neighbors, the Howells. If this is at all true, then they had to have returned within a 3 year period.
Attached is an 1870 Map, showing the then current owners of the property, superimposed over an aerial map of the land.
Also attached is a current Google image of the property. It's located in Ursa Township, Adams County, Illinois, part of the Quincy Metro Area, but pretty far north of the City.
1870 OWNERS OF CLARK PROPERTY
2010 GOOGLE EARTH IMAGE OF PROPERTY
BOUNTY LAND GRANT FROM PRES. JAMES MONROE TO JAMES CLARKE
Note that President Madison spelled James name Clarke with an "e". James' sale deed shows his name as James Clark, with no "e".
I don't know when James or Anne died. But their children, James, Delia, and Leonard stayed in East Haddam, CT the remainder of their lives.