Man, elevated by knowledge in the scale of being, controls the forces of nature with greater power and grander results, and accumulates wealth more rapidly. The educated free labor of Massachusetts, we have seen, doubles the products of toil, _per capita_, as compared with Maryland, and quadruples them (as the Census shows) compared with South Carolina. One day's labor of a man in Massachusetts is more than equal to two in Maryland, and four in South Carolina. So, if we take our savage tribes, with their huts and tents, their rude agriculture, their furs, their few and simple household manufactures, their hunting and fishing, the average product of their annual labor, at four cents a day each, would be $14.60 a year, or more than a fourth of that of South Carolina (56.91). So that Massachusetts, in material progress, is farther in advance of South Carolina than that State is of the savage Indians. Thus we have the successive steps and gradations of man: Massachusetts, with free labor and free schools, having reached the highest point of civilization: South Carolina, with slavery and ignorance (except the few), in a semi-barbarous stage; and the lowest savage condition, called barbarous, but nearer to South Carolina than that State to Massachusetts. Slavery, then, the Census proves, is hostile to the progress of wealth and population, to science, literature, and education, to schools, colleges, and universities, to books and libraries, to churches and religion, to the press, and therefore to free government; hostile to the poor, keeping them in want and ignorance; hostile to labor, reducing it to servitude, and decreasing two thirds the value of its products; hostile to morals, repudiating among slaves the marital and parental condition, classifying them by law as chattels, darkening the immortal soul, and making it a crime to teach millions of human beings to read or write. And shall labor and education, literature and science, religion and the press, sustain an institution which is their deadly foe? The discussion will be continued in my next letter. R. J. WALKER. PALMER, THE AMERICAN SCULPTOR.