I herewith submit the correspondence which has recently taken place between the American minister at the Court of St. James, Mr. Stevenson, and the minister of foreign affairs of that Government on the right claimed by that Government to visit and detain vessels sailing under the American flag and engaged in prosecuting lawful commerce in the African seas. Our commercial interests in that region have experienced considerable increase and have become an object of much importance, and it is the duty of this Government to protect them against all improper and vexatious interruption. However desirous the United States may be for the suppression of the slave trade, they can not consent to interpolations into the maritime code at the mere will and pleasure of other governments. We deny the right of any such interpolation to any one or all the nations of the earth without our consent. We claim to have a voice in all amendments or alterations of that code, and when we are given to understand, as in this instance, by a foreign government that its treaties with other nations can not be executed without the establishment and enforcement of new principles of maritime police, to be applied without our consent, we must employ a language neither of equivocal import or susceptible of misconstruction. American citizens prosecuting a lawful commerce in the African seas under the flag of their country are not responsible for the abuse or unlawful use of that flag by others; nor can they rightfully on account of any such alleged