Maj. Gen. William Hardee was quite impressed with Cleburne's work and its results. After the war he wrote in the Southern Historical Society Papers about Cleburne's war college at Tunnel Hill and the men he trained:
[Cleburne] devoted the winter months to the discipline and instruction of his troops, and revived a previously adopted system of daily recitations in the tactics and the art of war. He himself heard the recitations of his brigade commanders—a quartette of lieutenants worthy of their captain—the stately Granberry [sic], as great of heart as of fame, a noble type of the Texan soldier; Govan, true and brave as he was courteous and gentle; [Polk], young, handsome, dashing and fearless, and Lowry* [sic], the parson soldier, who preached to his men in camp and fought with them in the field with equal earnestness and effect. These brigadiers heard the recitations of the regimental officers. The thorough instruction thus secured, first applied on the drill ground and then tested in the field, gave the troops great efficiency in action.
Sources: Pat Cleburne: Confederate General, Howell & Elizabeth Purdue; "Biographical Sketch of Major-General Patrick R. Cleburne," Gen. William J. Hardee, Southern Historical Society Papers, Vol. 31