Supplies of provisions, water casks, merchandise, and articles connected with the prosecution of the slave trade are, it is understood, freely carried by vessels of different nations to the slave factories, and the effects of the factors are transported openly from one slave station to another without interruption or punishment by either of the nations to which they belong engaged in the commerce of that region.  I submit to your judgments whether this Government, having been the first to prohibit by adequate penalties the slave trade, the first to declare it piracy, should not be the first also to forbid to its citizens all trade with the slave factories on the coast of Africa, giving an example to all nations in this respect which if fairly followed can not fail to produce the most effective results in breaking up those dens of iniquity.

M. VAN BUREN