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Hiram Mack Burrows, Capt. was a Methodist minister and medical doctor. He was born in 1821 in Clintonville, Kentucky. He married Elizabeth Jane Lewis on April 15, 1850, and they migrated to Texas the next year. Before the war, he preached on the Austin circuit, at the Georgetown mission, and in Belton, Texas. He also served in the Texas militia. Captain Burrows died June 2, 1890, in Dalby Springs, Texas.

COMPANY RECORD
The Williamson Grays were joined for duty and enrolled in Georgetown, Williamson County, Texas, on October 7, 1861, by Capt. Hiram Mack Burrows. During the course of the war, the company was referred to as Captain Burrows' Company; 7th Regiment Texas Mounted Volunteers, Captain Burrows' Company; 3rd Regiment, Sibley's Brigade Mounted Volunteers; and Company C, 7th Regiment Texas Cavalry.

The company set out for San Antonio, Texas, and were mustered into the Confederate service at Camp Pickett for "3 years or the war" on October 24, 1861. They were the smallest company in the Brigade with 56 men at the outset. They served as part of Steele's Regiment under Colonel William Steele and General H. H. Sibley and formed a portion of Steele's forces which occupied the El Paso-Mesilla area. The Williamson Grays set out from San Antonio for the West on December 18, 1861. They formed a portion of Colonel William Steele's force in the Mesilla-El Paso area, and thus did not take part in the New Mexico campaign proper. They arrived in Arizona around January 21, 1862, and remained there as the rear guard evacuating Confederate Arizona and far West Texas, leaving in July, 1862. After Steele was promoted to Brigadier-General in September, 1862, Company C served under Col. Arthur P. Bagby. In January, 1863, the Williamson Grays, along with the other units under the command of Col. Bagby, participated in the engagement at Galveston. On February 9, 1863, they marched from Houston for Western Louisiana, where they served through the end of the war. The company disbanded June 19, 1865, in East Texas.

According to Noel, they participated in the following battles and skirmishes in Western Louisiana:

Bisland (April 13-14, 1863),
Centerville (April 14, 1863),
New Iberia (April 16, 1863),
Vermilion Bayou (April 17, 1863),
Grand Coteau (April 19, 1863),
Franklin (May 24, 1863),
Fort Butler (July 11, 1863),
Morgan's Ferry (September 7 1863),
Carrion Crow (October 13, 1863),
Mrs. Rodgers' Plantation (October 16, 1863),
Hudson's Plantation (October 18, 1863),
Opelousas (October 21, 1863),
Vermilionville (November 11, 1863),
Camp Pratt (November 20, 1863) (note states "7th Texas Cav., surprised"),
Double Bridges (April 2, 1864),
Young's Mill (April 7, 1864),
Mansfield (April 8, 1864),
Alexandria (April 28, 1864),
Capture transport City Belle (May 3, 1864),
Capture transport J. Warner (May 5, 1864),
Lecompte (May 7, 1864),
Marksville (May 15, 1864),
Yellow Bayou (May 18, 1864),
Raid to Vidalia (July 23, 1864).