It may or may not be a "lead", but there is a JOHN CRAVEN buried at Jefferson Barracks National Cemetery...died in 1864...you can view a memorial at the following link:
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=Craven&GSfn=John&GSbyrel=in&GSdyrel=in&GSst=26&GScntry=4&GSob=n&GRid=38743819&df=all&

There might be other possibilities on www.findagrave.com
Good luck.
Maggie