GENTLEMEN,--I hesitated long before resolving to address you this letter. I feel that I shall be amenable to the charge of egotism; but I have written a book, in which I undertake to defend and justify Slavery, and to advise the South as to its future policy. In that I am egotistical, as every one is who writes a book. I have "stepped in so far, that returning were more tedious than go o'er." I will not do things by halves. When I wrote that book, I believed that Government, Law, Religion, and Marriage, were victims bound and filleted for sacrifice by Northern abolition. What was then matter of doubtful opinion, inference and speculation, has become, since my trip to the North, subject of fixed faith and conviction. I enjoyed the warm and elegant hospitality of some of the Liberty party of the North. I was in social intercourse with many of them. I have received many pamphlets, books and speeches from them. I have no private confidences to betray, because I heard no secrets. This party is conscientious, believes itself right, and courts discussion and notoriety. I, besides, conversed freely with strangers, in public conveyances and at hotels. I think, with my previous study on the subject of Slavery and Abolition, I may be able to make some useful suggestions to the South and the North. It seemed to me, that in attempting to prove "Free Society a failure," in my lecture at New Haven, I was "but carrying coals to New Castle." The Liberty party, at least, discovered that long before I did, and are as intent on subverting and re-constructing society at home, as on abolishing slavery with us. A part of them, I will not undertake to say how large a portion, are infidels, who find the Bible no impediment to their schemes of social reform, because they assert that it is false. This wing of the Liberty party is in daily expectation of discovering a new Social Science, that will remedy all the ills that human flesh is heir to. They belong to the schools of Owen, Louis Blanc, Fourier, Comte, and the German and French Socialists and Communists. The other wing, and probably the most numerous wing of the party, is composed of the Millenial Christians--men who expect Christ, either in the flesh or in the spirit, soon to reign on earth; the lion to lie down with the lamb; every man to sit down under his own vine and fig tree; all to have an interest in lands; marrying and giving in marriage to cease; war to be abolished, and peace and good will to reign among men. They are as intent on abolishing all Church government and authority, as the infidels. They would, equally with them, trample on all law and government, because "liberty is," say they, "an inalienable right," and law, religion, and government continue to protect slavery. Marriage, Christian marriage, which requires the obedience of the wife, is slavery; and they would modify it, or destroy it. Land monopoly, they say, gives to property or capital a greater power over labor than