But McClellan’s brief, bright hour was over. That same day, while long lines formed in front of Mathew Brady’s gallery in New York City to see gruesome photographs of dead soldiers at Antietam, his Civil War career ended. Lincoln, long-suffering and almost preternaturally patient with his problem child, had finally had enough. During the snowstorm, Lincoln’s emissary, the picturesquely named Brigadier General Catharinus P. Buckingham, arrived to tell McClellan that he was relieved, effective immediately, and replaced by Major General Ambrose Burnside.