To see a roster of the 28th Texas Cavalry, including Company G, go to the following website: www.angelfire.com/tx/RandysTexas/28thCavMust.html
For further information about the 28th Texas, see my book:
Johansson, M. Jane. PECULIAR HONOR: A HISTORY OF THE 28TH TEXAS CAVALRY, 1862-1865. Fayetteville: University of Arkansas Press, 1998.