Here is some more information on Ector's Brigade and the 10th Texas Cavalry (dismounted).
My great, great grandfather, Elijah D. Wyatt, had a tannery at Coffeeville in Upshur County Texas. He made harness and leather goods and supplied the Confederate troops training at Camp Talley which was located at Coffeeville, Texas. In 1861, Locke's and Earp's 10th Texas Cavalry Regiment was raised in Smith, Upshur and Cherokee County and was in training at Camp Talley. In 1861, the 10th Texas Cavalry (dismounted) had 900 effectuals.
The 10th Texas Cavalry (dismounted) was moved from Camp Talley to Clarksville and was marched to Little Rock Arkansas. My great great grandfather Elijah Wyatt was 42 years old and was too old to enlist when the 10th Texas moved out. He loaded several wagons with harness and leather goods and accompanied the regiment to Arkansas as a sutler. A measles epidemic took 150 men on the march to Little Rock and upon arriving at Little Rock, the 10th Texas was marched to Fort Smith and a few days later, was ordered back to Little Rock. My great, great grandfather died of measles in 1861 and is buried in the Confederate Cemetery in Little Rock.
Weakened by poor rations and the long road marches, by the time the 10th Texas arrived back in Little Rock, the regiment had lost 350 men to disease and exposure. The remainder of the regiment moved across the Mississippi River and joined Ector's Brigade in time for the battle at Murfeesboro, TN.