For what it may be worth, my notes on this regiment for the period in question indicate:

6/17/63 List of cdrs of divisions, Bgdes, & Regts in the Dist of Tex, New Mexico, & Az.
Rank Name Station Command Remarks
E J Gurley Hempstead 30th Tex Cav Regt Cav, En route to Northern Sub-Dist

Bankhead's Bgde was formed in the summer of 1863 from three Tex Cav Regts, either recently formed or organized earlier but in camp in Tex for want of arms. The initial three Regts of Bankhead's Bgde consisted of:
-Col Gurley's 30th Tex Cav (which had organized earlier under the title of 1st Tex Partisan Rangers-distinct from W. P. Lane's Regt with the same name),
-Col W. P. Hardeman's 1st Tex Cav-Az. Bgde
-Terrell's Regt Tex Cav

In mid-July 1863, two of Bankhead's Regts (Gurley's & Hardeman's) were still in formative stages, having only 425 & 350 eff enlisted men, respectively, in camp. In the absence of Cav weapons, Gen Bankhead drilled these two Regts as Infy.
The 3rd Regt, Terrell's, had not joined the rest of the Bgde, but Gen Bankhead noted that even if it had been present, it was still unarmed.

8/22/63 Gen Bankhead received orders to march north to reinforce Gen Steele but without Col Terrell's Regt (which had been dismtd & sent to reinforce Galveston, causing a minor mutiny in Regt). The next day, Acting Gen Bankhead informed his superiors of his slow progress:
. . . Gurley's Regt, under Lt Col Battle, moved forward today for Boggy Depot- Krumbhaar's Btry follows tomorrow, & Hardeman the next day- The scarcity of water requires that I should move up by detachments, as there is but little water within 37 miles of this place, & not enough for my entire command at any one point. I shall halt at Boggy Depot until I hear from Gen Steele.
I will he enabled to support Gen Steele with an eff total of about 1,200. This includes Showalter's & Col Bourland's Regt Tex Cav commands. 1 have been compelled, however, to arm them with some of the guns intended for Col Terrell, & will not be able to send back more than 300 stand of arms This need cause no disappointment, as the Tex made guns are so indifferent that I would not use them if I had shotguns or the ordinary hunting rifles, but many of Bourland's command, & all of Showalter's, are without arms & I was compelled to take this poor apology for a weapon or leave these troops behind.
Gen Bankhead's Bgde, subsequently also reinforced by the temporary addition of Col Martin's 5th Regt Tex Partisan Rangers detached from Cooper's Bgde & the permanent transfer of Col DeMorse's 29th Tex Cav from the same Bgde, would serve in the Indian Terr. for the remainder of the year, supplemented with at least two other …