Mr. Seward to Mr. McMahon.

No. 9.]

Sir: Your interesting dispatch from Rio de Janeiro, No. 6, of the 26th ultimo, has been received.

The instruction, No. 7, of the 21st instant, makes it unnecessary to write to you further upon the subject at present.

I am, sir, your obedient servant,

WILLIAM H. SEWARD.

Martin T. McMahon, Esq., &c., &c., &c.