Sorry for the delay, I just found your reply!
Much of your family ended up in Altus, OK, am I right? Most of mine ended up in Blair, OK, about 10 miles north of Altus. William Peyton Southall was my grandfather. I have spent much time in Altus Blair. My grampa used to say that the Altus Southalls were not kin to the Blair Southalls, though I'm sure he knew that way back we were kin. The name is TOO unusual! I believe that your Holman was brother to John, father of my James. This is very difficult to decipher, as there were several James Southalls born in that time period, in the same family, and in the same area. I have a lot of interesting info regarding the Southall family. Please email me: firstname.lastname@example.org