Lincoln & McClellan at Antietam

“After the battle of Antietam, I went up to the field to try to get him to move and came back thinking he would move at once,” Lincoln told his secretary John Hay. “But when I got home, he began to argue why he ought not to move. I peremptorily ordered him to advance. It was nineteen days before he put a man over the [Potomac] River. It was nine days longer before he got his army across.” (Elson, Henry W. The Photographic History of the Civil War. 1912)