I have the roster for the 5th Alabama Cavalry and he is listed as R. M. Livingstone Pvt Co. I . There are two other Livingstons in Co. I: S. B. and S. N.Livingston.They could all be brothers ie Shelby, Samuel and or Stephen. The 5th surrendered at Danville, AL. Pension records may lead to further info. I have not checked them out.