Milo:
Ancestry's information will be limited in some areas and may be quite expansive in others... Census records are restricted so they may not be helpful but there are a lot of other records that might give clues - the problem here would be linking military etc. records to a "real human being"...
I'm quite willing to have a dig around I just need to know what information you want to start with.... I've become a bit of a sleuth on Ancestry so it might work... On the other hand, I have several "mysteries" in my family history that are mind numbing...
No, I am not talking about the identity of my father...