If you find Hammet buried Oakwood try placing memorial at Find A Grave-after registarion
http://www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=51498&CScn=Oakwood&CScntry=4&CSst=48&CScnty=2929&

Note if died in Petersburg probably buried at
http://www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=49478&CScn=Blandford&CScntry=4&CSst=48&