4. That Africa in its present state furnished several valuable articles of commerce which were partly peculiar to itself, but that it was adapted to the production of others, with which we were now either wholly or in great part supplied by foreign nations. That an extensive commerce with Africa might be substituted in these commodities, so as to afford a return for as many articles as had annually been carried thither in British vessels: and, lastly, that such a commerce might reasonably be expected to increase by the progress of civilization there. 5. That the Slave-trade was peculiarly destructive to the seamen employed in it; and that the mortality there had been much greater than in any British vessels employed upon the same coast in any other service or trade. 6. That the mode of transporting the slaves from Africa to the West Indies necessarily exposed them to many and grievous sufferings, for which no regulations could provide an adequate remedy; and that in consequence thereof a large proportion had annually perished during the voyage. 7. That a large proportion had also perished in the harbours in the West Indies, from the diseases contracted in the voyage and the treatment of the same, previously to their being sold, and that this loss amounted to four and a half per cent. of the imported slaves. 8. That the loss of the newly imported slaves, within the three first years after their importation, bore a large proportion to the whole number imported. 9. That the natural increase of population among the slaves in the islands, appeared to have been impeded principally by the following causes:--First, By the inequality of the sexes in the importations from Africa. Secondly, By the general dissoluteness of manners among the slaves, and the want of proper regulations for the encouragement of marriages and of rearing children among them. Thirdly, By the particular diseases which were prevalent among them, and which were in some instances to be attributed to too severe labour, or rigorous treatment, and in others to insufficient or improper food. Fourthly, By those diseases, which affected a large proportion of negro-children in their infancy, and by those, to which the negros newly imported from Africa had been found to be particularly liable.