Mr. Charles A. Dana, Assistant Secretary of War, says, "A spy whom we employed to report to us the proceedings of the Confederate government and its agents, and who passed continually between Richmond and St. Catherines, reporting at the War Department upon the way, had come in from Canada and had put into my hands an important despatch from Mr. Clement C. Clay, Jr., addressed to Mr. Benjamin. Of course the seal was broken and the paper read immediately. It showed unequivocally that the Confederate agents in Canada were making use of that country as a starting-point for warlike raids which were to be directed against frontier towns like St. Albans in Vermont. Mr. Stanton thought it important that this despatch should be retained as a ground of reclamation to be addressed to the British government. It was on a Sunday that it arrived, and he was confined to his house by a cold. At his direction I went over to the President and made an appointment with him to be at the Secretary's office after church. At the appointed time he was there, and I read the despatch to them. Mr. Stanton stated the reasons why it should be retained, and before deciding the question Mr. Lincoln turned to me, saying,-- "'Well, Dana?' "I observed to them that this was a very important channel of communication, and that if we stopped such a despatch as this it was at the risk of never obtaining any more information through that means. "'Oh,' said the President, 'I think you can manage that. Capture the messenger, take the despatch from him by force, put him in prison, and then let him escape. If he has made Benjamin and Clay believe his lies so far, he won't have any difficulty in telling them new ones that will answer for this case.' "This direction was obeyed. The paper was sealed up again and was delivered to its bearer. General Augur, who commanded the District, was directed to look for a Confederate messenger at such a place on the road that evening. The man was arrested, brought to the War Department, searched, the paper found upon him and identified, and he was committed to the Old Capitol Prison. He made his escape about a week later, being fired upon by the guard. A large reward for his capture was advertised in various papers East and West, and when he reached St. Catherines with his arm in a sling, wounded by a bullet which had passed through it, his story was believed by Messrs. Clay and Jacob Thompson, or, at any rate, if they had any doubts upon the subject, they were not strong enough to prevent his carrying their messages afterward.