Mr. Seward to Lord Lyons.

My Lord: I have the honor to acknowledge the receipt of your note of the 18th instant, in which, under instructions of her Majesty’s principal secretary of state for foreign affairs, you make known to this government the suspicions entertained by her Majesty’s commissioners at London respecting the American-brigantine Myra, which vessel had arrived at the port of Massamedes on the 23d of February last, under such circumstances as to induce a belief that she was intended to be employed in the slave trade. In reply, I have the honor to thank your lordship for this information, and to inform you that I have communicated it to the Secretary of the Navy.

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

WILLIAM H. SEWARD.

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