I transmit herewith to the Senate a collection of the commercial regulations of the different foreign countries with which the United States have commercial intercourse, which has been compiled in compliance with the resolution of the Senate of 3d March, 1817. JAMES MONROE. WASHINGTON, _December 14, 1819_. _To the House of Representatives of the United States_: In conformity with the resolution of the House of Representatives of the 24th of February last, I now transmit a report of the Secretary of State, with extracts and copies of several letters, touching the causes of the imprisonment of William White, an American citizen, at Buenos Ayres. JAMES MONROE. WASHINGTON, _December 17, 1819_. _To the Senate and House of Representatives of the United States_: Some doubt being entertained respecting the true intent and meaning of the act of the last session entitled "An act in addition to the acts prohibiting the slave trade," as to the duties of the agents to be appointed on the coast of Africa, I think it proper to state the interpretation which has been given of the act and the measures adopted to carry it into effect, that Congress may, should it be deemed advisable, amend the same before further proceeding is had under it. The obligation to instruct the commanders of all our armed vessels to seize and bring into port all ships or vessels of the United States, wheresoever found, having on board any negro, mulatto, or person of color in violation of former acts for the suppression of the slave trade, being imperative, was executed without delay. No seizures have yet been made, but as they were contemplated by the law, and might be presumed, it seemed proper to make the necessary regulations applicable to such seizures for carrying the several provisions of the act into effect. It is enjoined on the Executive to cause all negroes, mulattoes, or persons of color who may be taken under the act to be removed to Africa. It is the obvious import of the law that none of the persons thus taken should remain within the United States, and no place other than the coast of Africa being designated, their removal or delivery, whether carried from the United States or landed immediately from the vessels in which they were taken, was supposed to be confined to that coast. No settlement or station being specified, the whole coast was thought to be left open for the selection of a proper place at which the persons thus taken should be delivered. The Executive is authorized to appoint one or more agents residing there to receive such persons, and $100,000 are appropriated for the general purposes of the law.