I just realized that Mary Catherine remarried in the same county as they were in 1860. He isn't listed as buried there that I can find. Just know she was sill there in 1866. That makes me think there is where he died. I just had this conversation a few hours ago with one oh his daughter in laws descenants WMF line. Her grandmother said native american. I will give the Hampton for his mother a look see. I did rule out the civil war a delete. The other Wades wife filed for widows pension. At least I helped their family out. I would love if he did DNA wish him and you luck it hadn't helped me much with my Hicks/Holt lines. Is your brother a Holt? that might help more.
IIf I find any new proof I will let you know.