Kitty,
This is taken from unit information of Ragsdale's Battn.
1 st Co.A of Ragsdale's Battn. was formally called 1st Co.A and then 1st H, 4th. 2nd, & 1st Battns., (A.H. Davidson's Battn. Arizona Brig.,W.L. Davidson's Battn. and Daly's Battn.) This Co. then known as Co A Daly's Battn. was transferred to Benavides Regt. Tex Cav per SO 104 Hqs. Dept of Texas dated April 13, 1864. It was then known as George A.Gibson's Co. and as Co. D.
Mike