The following is taken from New York in the War of the Rebellion, 3rd ed. Frederick Phisterer. Albany: J. B. Lyon Company, 1912.

By the orders of the War Department, dated June 17, 1865, this organization was formed, by the consolidation of the 6th [Regiment] and 15th Regiments of Cavalry, and Col. Charles L. Fitzhugh, of the 6th Cavalry, assigned to its command. Companies A, B, C, D, E, I, L and M were formed of the 6th, and F, G, H, and K of the 15th Cavalry. Commanded by Lieut.-Col. Harrison White, the regiment was honorably discharged and mustered out, August 9, 1865 at Louisville, Ky., having lost by death of disease and other causes twelve enlisted men.

The following is taken from The Union army: a history of military affairs in the loyal states, 1861-65 -- records of the regiments in the Union army -- cyclopedia of battles -- memoirs of commanders and soldiers, Volume II: New York, Maryland, West Virginia and Ohio. Madison, WI: Federal Pub. Co., 1908.

Second Provisional Cavalry.—Col.. Charles L. Fitzhugh; Lieut.- Col., Harrison White; Majs., Robert H. S. Hyde, George W. Goler, George E. Farmer. This regiment was formed by the consolidation of the 6th and 15th regiments of cavalry on June 17, 1865. Under the command of Lieut.-Col. White, it was mustered out on Aug. 9, 1865, at Louisville, Ky. Its loss from disease and other causes was 12 men.