Would you please email me at Mapmaker3@aol.com? I know we conversed at length before, but let me know what clues you have about your great, great grandfather's identity and I will try again. For starters, in which Illinois county did he settle after the war? I cannot promise anything, but perhaps I can help you narrow your search.
This is an intriguing case, or Casey, if you will forgive the pun.
Bruce Nichols