“In the literature of the slave trade,” says Metcalff, “the horrors of the path of commerce stand out as prominently as the persecutions of the Roman emperors in the history of Christianity. When the sea gives up its dead there will come from this highway of cruelty a prodigious army of martyrs to man’s inhumanity to man. The best authorities agree in estimating that of all the slaves taken from Africa at least one-eighth—some authorities say more than a quarter—died or were killed in transit. It staggers the imagination to think of how thickly the traffic in these helpless savages, continued through almost four centuries, must have strewn with corpses the lower depths of the Atlantic. “Of course it was necessary, if any part of the cargo was to be delivered alive, that the negroes should occasionally be brought on deck and exercised. This was done with a few at a time, although their masters never went so far as to free even these from their irons. Often it was found when a couple was to be brought up that one of them had died and that his mate had spent hours, days even, in the stifling atmosphere of between-decks, manacled to and in constant contact with a corpse. It is small wonder that, as often happened, when the slaves were brought on deck they began jumping overboard in couples, sooner than return to the heat, thirst, stench, and filth of the hold, where the scalding perspiration of one ran to the body of another and where men were constantly dying in their full view. Sooner than endure these tortures even the savage Africans sought refuge in death by starvation. This was a contingency provided for in advance by the experienced trader, and if the gentle persuasion of the thumb-screw failed to cure the would-be suicide, the ships were always provided with a clever device to compel the human animal to take the nourishment which kept in him the life without which he ceased to possess any pecuniary value. This instrument consisted of a pair of iron compasses, the legs of which were driven into the mouth when closed and then forced open and held open by the action of a screw. Even the African negro, stoic to the pains incident to a life of savagery, would renounce the privilege of death by starvation to escape the immediate agony of forcibly distended jaws, especially when at the same time his thumbs were under the pressure of the screw with blood exuding from their ends.” Branded like cattle, the negroes, after their arrival in the American harbor, were sold by auction. And now the slave was, as the Civil Code of Louisiana said, “subject to the power of his master in such a manner that the master may sell him, dispose of his person, and of his labor. He can do nothing, possess nothing, nor acquire anything but that may belong to his master.”