My great-great grandfather, T.H. Clay, served in Co. H, 12th Texas Cavalry. He appears on the first company muster roll upon organization of the company (then the Ellis County Blues), on October 28, 1861 at Camp Hebert, near Hempstead, TX. He last appears as present on the company muster roll for the period Sept. 1- December 31, 1863. My question is are there any other known existing muster rolls for Co. H, 12th Texas Cavalry?

I appreciate any assistance. Thank you for your forum.