The following is taken from New York in the War of the Rebellion, 18th ed. Frederick Phisterer. Albany: J. B. Lyon Company, 1912.

Batteries A and B of this battalion, located at Rochester, and commanded by Maj. William M. Lewis, volunteered August 2, 1864, to serve one hundred days. They served at the depot Elmira as infantry, and were mustered out of the United States service, at Rochester, November 22, 1864. The battalion is not now in existence.

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.

First Battalion Light Artillery.—Maj., William M. Lewis. The 1st battalion, composed of Batteries A and B and known as the Rochester Union Grays, was located at Rochester and was mustered into the U. S. service for the term of 100 days, Aug. 31, 1864, for duty in guarding Confederate prisoners at Elmira. It was mustered out at Rochester Nov. 22, 1864.First Battalion Light Artillery.—Maj., William M. Lewis. The 1st battalion, composed of Batteries A and B and known as the Rochester Union Grays, was located at Rochester and was mustered into the U. S. service for the term of 100 days, Aug. 31, 1864, for duty in guarding Confederate prisoners at Elmira. It was mustered out at Rochester Nov. 22, 1864.