His greatest moment came at Chickamauga, where his stubborn defense earned him the sobriquet "Rock of Chickamauga.' DS, signed 'Geo. H. Thomas, Brig. Genl., USA,' one page, 17 x 14, December 1861. Muster roll for an unidentified unit from December, 1861, listing nine privates in the unit, their terms of service and pay. Nicely signed at the bottom by Thomas. Also signed by Brigadier General Andrew J. Mackay.' In fine condition, with some mild toning and a small separation along bisecting vertical fold. RRAuction COA.