The idea of colonizing the slaves in some other country, outside of the United States, seems the height of folly. Whatever may be the mineral wealth of a country, or the producing capabilities of the soil, neither can be made available without the laborer. Four millions of strong hands cannot be spared from the Southern States. All time has shown that the negro is the best laborer in the tropics. The slaves once emancipated and left on the lands, four millions of new consumers will spring into existence. Heretofore, the bondmen have consumed nothing scarcely from the north. The cost of keeping a slave was only about nineteen dollars per annum, including food, clothing, and doctors' bills. Negro cloth, negro shoes, and negro whips were all that were sent south by northern manufacturers. Let slavery be abolished, and stores will be opened and a new trade take place with the blacks south. Northern manufacturers will have to run on extra time till this new demand will have been supplied. The slave owner, having no longer an inducement to be idle, will go to work, and will not have time to concoct treason against the _stars and stripes_. I cannot close this appeal without a word about the free blacks in the non-slaveholding states. The majority of the colored people in the Northern States descended from slaves: many of them were slaves themselves. In education, in morals, and in the development of mechanical genius, the free blacks of the Northern States will compare favorably with any laboring class in the world. And considering the fact that we have been shut out, by a cruel prejudice, from nearly all the mechanical branches, and all the professions, it is marvellous that we have attained the position we now occupy. Notwithstanding these bars, our young men have learned trades, become artists, gone into the professions, although bitter prejudice may prevent their having a great deal of practice. When it is considered that they have mostly come out of bondage, and that their calling has been the lowest kind in every community, it is still more strange that the colored people have amassed so much wealth in every state in the Union. If this is not an exhibition of capacity, I don't understand the meaning of the term. And if true patriotism and devotion to the cause of freedom be tests of loyalty, and should establish one's claim to all the privileges that the government can confer, then surely the black man can demand his rights with a good grace. From the fall of Attucks, the first martyr of the American revolution in 1770, down to the present day, the colored people have shown themselves worthy of any confidence that the nation can place in its citizens in the time that tries men's souls. At the battle of Bunker Hill, on the heights of Groton, at the ever-memorable battle of Red Bank, the sable sons of our country stood side by side with their white brethren. On Lakes Erie and Champlain, on the Hudson, and down in the valley of the Mississippi,