382) Bailey, Anne J. BETWEEN THE ENEMY AND TEXAS: PARSONSíS TEXAS CAVALRY IN THE CIVIL WAR. Fort Worth, TX: Texas Christian University Press, 1989. Illus, maps, notes, bib, ind, recent paperback reprint, 374pp. $24.95
Bailey, Anne J. ed. IN THE SADDLE WITH THE TEXANS: DAY-BY DAY WITH PARSONíS CAVALRY BRIGADE, 1862-1865. Abilene, TX: McWhiney Foundation Press, 2004. Maps, notes, index, illustrated hard cover, 414pp. This is the Order Book of Colonel William H. Parsonsís Texas Cavalry Brigade, with a chronological narrative and notes by Bailey. $29.95.
Both of these books should be good reads to give you an outline of what the 21st Texas Cavalry of Parson Brigade was doing.
Both are available from Camp Pope Books http://www.camppope.com/texas.htm