Col. James E. McMahon, 164th N.Y. Inf #321

This media is available in the holdings of the National Archives and Records Administration, cataloged under the National Archives Identifier (NAID) 524640. Record group: Record Group 111: Records of the Office of the Chief Signal Officer, 1860 - 1985 (National Archives Identifier: 440) Series: Mathew Brady Photographs of Civil War-Era Personalities and Scenes, compiled 1921 - 1940, documenting the period 1860 - 1865 (National Archives Identifier: 524418) NAIL Control Number: NWDNS-111-B-221 111-B-221