HON ROBERT J. WALKER knows the South well, and he has of late written well on it and on the present state and future prospects of our country. Those who have read Mr. Atkinson's instructive pamphlet upon 'Cheap Cotton,' will be interested in the strong confirmation of his arguments given by Hon. Robert J. Walker, late of Mississippi, in the following statement contained in one of his recent letters: 'From long residence in the South, and from having traversed every Southern State, I know it to be true that cotton is raised there most extensively and profitably by non-slaveholders, and upon farms using exclusively white labor. In Texas, especially, this is a great truth, nor is there a doubt that skilled, educated, persevering, and energetic free labor, engaged voluntarily for wages for its own use, would in time, especially when aided by improved culture and machinery, produce much larger crops and better cotton than is now raised by the forced and ignorant labor of slaves, and at a much cheaper rate and a far greater profit than any crop now produced in the North.' With this great truth before us, will Government hesitate to seize on and settle Texas, as soon as circumstances admit? We have urged Texas from the beginning as the great stone of resistance which must eventually, by means of free labor be employed to stem the progress of cotton-ocracy in the other Southern States. On this subject Hon. Robert J. Walker's letter of June 28th is one of the most instructive and remarkable documents issued since the beginning of the free-labor agitation, and it is to be desired that it should be read by every freeman in the Union. Colonization, voluntary but effective, is, as he holds, the only remedy for the terrible evil of slavery, and the only basis of the peaceful restoration of the Union. It was urged, months ago, against THE CONTINENTAL by a radical Abolition organ, that while favoring Emancipation, we were quite willing 'to colonize the negro out of the way.' And if it could promote the real welfare of both black and white, why should he not be colonized, even 'out of the way'? 'But it is impossible,' say the Conservatives; to which we reply that this is an age of great conceptions and great deeds, and it would be strange indeed if we, with steamboats, could not effect as much as was done of old by the most primitive races of both hemispheres. The Incas of Peru had no difficulty in moving hundreds of thousands of a conquered race to fresh fields and pastures new--why should we find it impossible? Let the same enthusiasm which has been displayed on the bare subject of freeing the black, be devoted to freeing and placing him at the same time in a climate congenial to his nature, and we should soon witness a solution of our great national difficulty. * * * * * We are indebted to a genial Western correspondent for TOM JOHNSON'S BEAR.