When I came to occupy the Executive chair I could not be ignorant of the numerous complaints which had been made on account of alleged interruptions of American vessels engaged in lawful commerce on the coast of Africa by British cruisers on the ground of their being engaged in the slave trade. I could not be ignorant, at the same time, of the well-grounded suspicions which pervaded the country that some American vessels were engaged in that odious and unlawful traffic. There were two dangers, then, to be guarded against--the one, that this traffic would continue to be carried on in American ships, and perhaps much increased, unless some new and vigorous effort should be made for its suppression; the other, that acquiescence in the capture of American vessels, notorious slave dealers, by British cruisers might give countenance to seizures and detentions of vessels lawfully employed on light or groundless suspicions. And cases had arisen under the administration of those who preceded me well calculated to show the extent and magnitude of this latter danger; and believing that very serious consequences might in time grow out of the obvious tendency and progress of things, I felt it to be my duty to arrest that progress, to rescue the immunity of the American flag from the danger which hung over it, and to do this by recommending such a provision for the execution of our own laws as should remove all pretense for the interference of others. Among the occurrences to which I have alluded, it may be useful to particularize one case. The schooner _Catharine_, an American vessel owned by citizens of the United States, was seized on the coast of Africa by the British cruiser called the _Dolphin_ and brought into the port of New York in the summer of 1839. Upon being brought into port, Benjamin F. Butler, esq., district attorney of the United States for the southern district of New York, appeared in the district court of the United States for that district and in the name and behalf of the United States libeled the schooner, her apparel and furniture, for a violation of the several acts of Congress passed for the suppression of the slave trade. The schooner being arrested by the usual process in such cases and possession taken of her from the hands of the British captors by officers of the United States, the cause proceeded, and by a decree of the circuit court in December, 1840, a forfeiture was pronounced. From this decree an appeal was taken, which is now pending in the Supreme Court of the United States.