Mr. Seward to Lord Lyons.

My Lord: I have the honor to acknowledge the note which was sent to me by your lordship at a late hour last night, apprising me, at the request of his excellency Lord Monck, the governor general of Canada, of a rumored plot to disturb the peace and security of the lake frontier. After thanking you, in the name of the President, for information conveyed in so just and liberal a spirit, I have now to state to your lordship that the necessary measures have been taken to defeat the criminal enterprise to which I have alluded. Major General Dix will at once repair to the frontier, and take charge of the execution of these measures. Solicitous that they may be conducted in perfect comity and respect towards her Majesty’s authorities, I have, by the President’s direction, requested the honorable Preston King to visit Lord Monck, and to confer with him upon the subject, so as to secure a perfect understanding between the governor general and the agents of the United States. I will esteem it a favor if you will communicate to him the facts I have stated and the views I have expressed in this note.

I have the honor to be, with high consideration, your lordship’s obedient servant,

WILLIAM H. SEWARD.

Right Hon. Lord Lyons, &c., &c., &c.