Arguing from his first conclusion, the author draws the inference that "slavery is the necessary result" of the nature of the black and of the white man. "The negro is by nature indolent and improvident." "He is also ignorant." "He requires restraint and guidance"; "otherwise he would sink into helpless, hopeless vice, idleness, and misery." But in these words, and in others to the same purport, Mr. Fisher assumes that the nature of the black is incapable of such improvement as to make what he calls the necessary condition of servitude needless in the interest of either race. We are surprised that so good a reasoner should speak of the ignorance of the black as a natural disqualification for independence, and the more so, because, in another passage, Mr. Fisher says, with truth, "We darken his mind with ignorance." That some form of subjection of the negro may be necessary for a time that extends far into the future is a point we will not dispute; but that slavery, as that word is generally understood, is the necessary result of his nature and of our nature we believe to be utterly untrue. The whole history of American slavery, far from exhibiting the negro as incapable of improvement, shows him making a slow and irregular advance in the development of intellectual and moral qualities, under circumstances singularly unfavorable. It is the plea of the advocates of the slave-trade, that the black is civilized by contact with the white. The plea is not without truth. It is the universal testimony of slave-owners, and the common observation of travellers, that the city and house slaves, that is, those who are brought into most constant and close relations with the whites, show higher mental development than those who are confined to the fields. The experiment of education, continued for more than one generation, has never been tried. The black is in many of his endowments inferior to the white; but until he and his children and his children's children have shown an incapacity to be raised by a suitable training, honestly given, to an intellectual and moral condition that shall fit them for self-dependence, we have no right to assert that slavery is a necessary condition, if in the meaning of necessary we include the idea of permanence. It is not needful to present here other objections to this sweeping assertion. They are old, well-known, and unanswerable.