The following is the testimony of Jefferson, who had good opportunities for observation, and who certainly had no New-England prejudices: "There must, doubtless, be an unhappy influence on the manners of the people, produced by the existence of slavery among us. The whole commerce between master and slave is a perpetual exercise of the most boisterous passions; the most unremitting despotism on the one part, and degrading submission on the other. Our children see this and learn to imitate it; for man is an imitative animal. The parent storms; the child looks on, catches the lineaments of wrath, puts on the same airs in a circle of smaller slaves, gives loose to the worst of passions; and thus nursed, educated, and daily exercised in tyranny, cannot but be stamped by it with odious peculiarities. The man must be a prodigy, who can retain his morals and manners undepraved in such circumstances." In a community where all the labor is done by one class there must of course be another class who live in indolence; and we all know how much people that have nothing to do are tempted by what the world calls pleasures; the result is, that slaveholding states and colonies are proverbial for dissipation. Hence, too, the contempt for industry, which prevails in such a state of society.--Where none work but slaves, usefulness becomes degradation. The wife of a respectable mechanic, who accompanied her husband from Massachusetts to the South, gave great offence to her new neighbors by performing her usual household avocations; they begged her to desist from it, (offering the services of their own blacks,) because the sight of a white person engaged in any labor was extremely injurious to the slaves; they deemed it very important that the negroes should be taught, both by precept and example, that they alone were made to work! Whether the undue importance attached to merely external gentility, and the increasing tendency to indolence and extravagance throughout this country, ought to be attributed, in any degree, to the same source, I am unable to say; if _any_ influence comes to us from the example and ridicule of the slaveholding states, it certainly must be of this nature. There is another view of this system, which I cannot unveil so completely as it ought to be. I shall be called bold for saying so much; but the facts are so important, that it is a matter of conscience not to be fastidious. The negro woman is unprotected either by law or public opinion. She is the property of her master, and her daughters are his property. They are allowed to have no conscientious scruples, no sense of shame, no regard for the feelings of husband, or parent; they must be entirely subservient to the will of their owner, on pain of being whipped as near unto death as will comport with his interest, or quite to death, if it suit his pleasure.