It was brought to my attention the death date of 4 Feb 1865 provided by Ancestry.com is incorrect.

Military service records for Russell W. Legg indicate 7 Feb 1865 as the correct date.

Thanks Clifford!
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=legg&GSbyrel=all&GSdyrel=all&GSst=12&GScntry=4&GSob=n&GRid=10378388&