Mr. Seward to Lord Lyons.

My Lord: I have the honor to acknowledge the receipt of your communication of the 13th instant, informing me of the course adopted by your lordship concerning the representation made in my note of the 11th instant as to reported piratical designs of the insurgents in connexion with the schooners Montreal and Saratoga in Canadian waters, and to express my thanks for your prompt proceedings in the matter.

I have the honor to be, with high consideration, my lord, your obedient servant,

WILLIAM H. SEWARD.

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