"In 1843, a man would have been pronounced insane, had he predicted that slavery would be introduced there by the removal of congressional restrictions. Since then they have adopted the Virginia and Kentucky resolutions and Madison's report--the very corner-stone of State rights--as a part of the Democratic platform. They have by their votes in Congress and Convention given all these pledges to the Constitution since 1843; and if we could then fraternize with them, what change has transpired that justifies the delegates in that Convention, at least, in refusing now to fraternize with northern and southern Democrats?" The reader will easily see Col. Orr's position from this letter. He is a southern Democrat, and, as such, a defender of slavery and slavery extension, a free trader, and an opponent of all homestead bills, but he does not go with the most ultra class of Southern politicians; in short, he is "a National Democrat." He stands by the Democratic organization of the country, so long as it stands by the South and her institutions as well as it has done in the past. Upon the new issues of intervention for slavery in the territories he has not yet spoken, but he was, of course, a rigid Lecomptonite. But during the debate on the Kansas-Nebraska bill he spoke very decidedly. He said: "The legislative authority of a territory is invested with no vote for or against laws. We think they ought to pass laws in every territory, when the territory is open to settlement, and slaveholders go there, to protect slave property. But if they decline to pass such laws, what is the remedy? _None, sir._ If the majority of the people are opposed to the institution, and if they do not desire it ingrafted upon their territory, all they have to do is simply to decline to pass laws in the territorial legislature for its protection." In Congress, Col. Orr has generally ranged himself with the compromising democracy. He is not born of the old aristocratic stock of South Carolina planters, but was the son of a worker--a country merchant. This fact has never been lost sight of by a portion of the citizens of South Carolina, and they have been, some of them at least, his bitter enemies for years. It is not impossible but Col. Orr, for this reason, has taken a more "national" view of politics, and has refused to go out of the Union for the sake of the slaveholding aristocracy. In his personal appearance Col. Orr is not, perhaps, prepossessing; though his great, black eye and fine open face show the force and power of his intellect. He is large in person, and not particularly graceful in his actions or appearance. He has a certain dignity, however, which enforces attention if he is the orator of the occasion, and obedience if he is the presiding officer. JOHN MINOR BOTTS. We have no extended sketch of Mr. Botts to present to the reader, but a few leading facts in reference to the political man.