The first thing I would do is to get a copy of his application for a Civil War Pension. It states he is a "JR"
and an "INVALID". The originals are in the NARA in Washington DC. (If you need someone to get it for you, I will give you the name of the gal I use, she normally can gget in a couple of weeks and her rates are normallly less than the NARA directly.)
Name: WELLS, Justus P JR.
Svs: Co. B 1st Terrell(?) Regiment US Voluntary Infantry
Appl #: 1533042
Filed in California on 1 Mar ... year unreadible
I will keep looking