Just supposing! T V Leach served in the 10th will William Starr et al, was badly wounded and invalided out. Hence he spends the rest of the war in Texas. There appear to be little or no records on file for the 10th according to the documents in W Starrs file. Service in the 10th would seem to fit with your family history.

My guess is you will have to look for muster rolls in either newpapers, both when mustered in and from the 1870's onward when veterans were starting to write about their experiences. Another place to look is in the Confederate Veteran magazine.

Also check whether he applied for a pension.

Alan Thrower
England

PS Strange coincidence that T V Thornton and W Starr both have wives with the same first names and initial?