Mr. Seward to Mr. Stuart.

Mr. Seward presents his compliments to Mr. Stuart, and, with reference to his private note of the 29th ultimo relative to the exemption of her Britannic Majesty’s mail bags, on board of private vessels, from visitation or detention, has the honor to enclose herewith a copy of a letter which has since been addressed by this department to the Secretary of the Navy on the subject.