Mr. Seward to Mr. Riotte.

No. 29.]

Sir: I transmit, for your information, a copy of an instruction of the 30th September, upon the subject of the contemplated colonization of persons of African extraction, addressed by this department to several of the diplomatic agents of the United States accredited to governments of Europe, who have possessions within the tropics.

I am, sir, your obedient servant,

WILLIAM H. SEWARD.

Charles N. Riotte, Esq., &c., &c., &c. Costa Rica.