Clanton was not in 6th TX Cav Regt. An B. A. Clanton and an Ellis Clanton were in Co. D, 3rd TX Cav Regt. Might trying a one month subscription to Footnote.com. If you have the name and unit you can view and copy a soldiers record easily. These are the National Archive records that are being digitized. You might try the 6th TX Inf Regt or BN.