This contains the only reference I found in the OR re a "Houston Depot"

OFFICE OF CHIEF OF CLOTHING AND EQUIPAGE BUREAU,

MILITARY DISTRICT TEXAS, NEW MEXICO, AND ARIZ.,
Houston, October 12, 1863.

. . . . I retained immediate control of the Houston depot until the 1st September last, when I turned it over to Captain W. J. Mills, assistant quartermaster, who is managing to my satisfaction. I supervise it, however, constantly, as being the most important depot of clothing and equipage in the State.

The organization, then, is as follows:

Eastern Sub-District.-Principal depot at Houston, under Captain W. J. Mills, assistant quartermaster, with shoe, tailor, tent, tin, and carpenter shops. Branch depot at Austin, under Captain [James P.] McKinney, post quartermaster; his chief business is to make shoes.

Northern Sub-District.-Principal depot at Tyler, Smith County, under Captain Kirby, post quartermaster. He is principally occupied in making shoes.

Western Sub-District.-Principal depot at San Antonio, Bexar County, under Captain Prescott, post quartermaster, and now assisted by Lieutenant Bell, acting assistant quartermaster.

I have not yet received definite information concerning the manufacturing capacity of the San Antonio depot, as Captain Prescott has but just relieved Captain [E. P.] Gaines, assistant quartermaster.

There would appear to be two or three smaller depots in the Western Sub-District, judging by Major Russell's depot to Major Bloomfield of localities therein to which he has forwarded some of the clothing he has received from the Sir William Peel and other sources, at Brownsville, at Corpus Christi, Goliad, &c., and Captain Prescott does not seem to be aware of this. The question arises whether Captain Prescott ought not to have complete control, under my directions, of the movements of stores appertaining to his department; and yet, as Major Russell is his superior, it would seem a violation of the rights of the latter officer to direct him to report to Captain Prescott, and receive instructions where to ship clothing and equipage supplies to, and when. . . .

E. C. WHARTON,
Major Quartermaster, Chief of Bureau.

OR V26, Pt. 2, Serial 042 Page 306