This is all I could come up with:

W. W. Watkins, Private, Company M, Crump’s Regiment Texas Cavalry (Lane’s Regiment Cavalry, 1st Partisan Rangers), captured near Opelousas, Bayou Teche, October 21/22, 1863, “Refused to take the oath of allegiance. Sent to the rear,” confined to Custom House, New Orleans, La. November 1, transferred December 21 to New Iberia for exchange, no further records

M323: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Texas

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1st Regiment Partisan Rangers was formed during the summer of 1862 with about 1,000 men. Many were from San Augustine and Paris. The unit served in D. H. Cooper's, Major's, and Hardeman's Brigade in the Trans-Mississippi Department. It fought at Prairie Grove, skirmished in Louisiana, and fought in the conflicts at Mansfield and Pleasant Hill. Later it continued the fight in Louisiana and in May, 1865, disbanded. The field officers were Colonel Walter P. Lane, Lieutenant Colonel R. P. Crump, and Majors A. D. Burns and W.P. Saufley.

https://familysearch.org/learn/wiki/en/Crump's_Regiment,_Texas_Cavalry_(Lane's)_(1st_Texas_Partisan_Rangers)_(Confederate)

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First Texas Partisan Cavalry

Prairie Grove, AR after action report:

Report of Lieut. Col. R. P. Crump, First Texas Partisan Cavalry.

CAMP ON COVE CREEK, ARK.,
December 9, 1862.

COL.: I have the honor to report that on the morning of the 7th instant we
attacked the enemy's cavalry near Prairie Grove Church, supposed to be 600
strong, composed of the First Kansas, 7th MO Cavalry and First Arkansas Regiments.
Lieut.-Col. Young charged on the right, quartered on the left; my command
penetrated the center, completely routing him, pursuing him, and keeping
up a running fight for 5 miles, killing about 40, capturing about 200
prisoners, including Maj. Hubbard, 40 wagons, and several negroes, 200
stand of arms, and 200 horses. We also had the pleasure of recapturing Col.
Shelby and his battery of light artillery, who had been previously taken
by the enemy. The wagons were loaded with boots, shoes, hats, arms, sugar,
coffee, rice, flour, hams, tobacco, cigars, tents, and camp equipage.

Accompanying this you will find a list* of killed, wounded, and missing,
with the other casualties of the regiment.

The officers and men, without exception, behaved most gallantly.

Respectfully,

R. P. CRUMP,
Lieut.-Col., Cmdg. First Texas Regt. Partisan Rangers.

Col. EMMETT MACDONALD.

Source: Official Records
PAGE 157-32 MO., ARK., KANS., IND. T., AND DEPT. N. W. [CHAP. XXXIV.
[Series I. Vol. 22. Part I, Reports. Serial No. 32.]