The hotel manager says that the murdered agent saved his life "at the second Battle of Bull Run" by staying with him after he had been injured, and that both were held as prisoners for three years. Later, he says that he played cards with the same man "right after Antietam." Second Bull Run occurred in August, 1862; the Battle of Antietam was fought in September, 1862. He couldn't have been imprisoned after Bull Run and still played cards right after Antietam.