Probably one reason why Mr. Lincoln did not particularly care to go to the theatre that night was a sort of half promise he had made to his friend and bodyguard, Marshal Lamon. Two days previous he had sent Lamon to Richmond on business connected with a call of a convention for reconstruction. Before leaving, Mr. Lamon saw Mr. Usher, the Secretary of the Interior, and asked him to persuade Mr. Lincoln to use more caution about his personal safety, and to go out as little as possible while Lamon was absent. Together they went to see Mr. Lincoln, and Lamon asked the President if he would make him a promise.
"I think I can venture to say I will," said Mr. Lincoln. "What is it?"
"Promise me that you will not go out after night while I am gone," said Mr. Lamon, "particularly to the theatre."
Mr. Lincoln turned to Mr. Usher and said: "Usher, this boy is a monomaniac on the subject of my safety. I can hear him or hear of his being around at all times in the night, to prevent somebody from murdering me. He thinks I shall be killed, and we think he is going crazy. What does any one want to assassinate me for? If any one wants to do so, he can do it any day or night if he is ready to give his life for mine. It is nonsense."
Mr. Usher said to Mr. Lincoln that it was well to heed Lamon's warning, as he was thrown among people from whom he had better opportunities to know about such matters than almost any one.
"Well," said Mr. Lincoln to Lamon, "I promise to do the best I can toward it."