2-365-469 - The Print Collector/Heritage Images

General McClellan's headquarters, Antietam, Maryland, American Civil War, 1861-1862 (1955). Only a few federal officers knew that the man seated with a cigar in his hand was Allan Pinkerton, founder of the famous detective agency. Pinkerton, who organized the Union intelligence service, was known only as 'Major Allen'. Directly behind him is John C Babcock, who worked under Pinkerton. Next to him is George H Bangs, later a famous Pinkerton superintendent. Another Pinkerton operative, Angus K Littlefield, is on the left and the other seated man is William Moore, Secretary of War Edwin McMasters Stanton's private secretary. A print from Mathew Brady Historian with a Camera by James D Horan, Bonanza Books, New York, 1955.