"These elections do demonstrate this fact, beyond a cavil, that the sentiment of the great majority of the people of this Union is irrevocably opposed to the extension of slavery; that they are determined, if overwhelming public sentiment can avail anything, another slave State shall not be admitted into the confederacy. And why are they so determined? Because they believe, and not only believe, but see and know, that slavery is an unmitigated curse to the soil that sustains it. They know this, because they see every free State outstripping every slave State in all the elements that make a people powerful and prosperous; because they see the people in the one educated and thrifty, and in the other ignorant and thriftless; because they have before their eyes a State like our own, once the very Union itself almost in importance, to-day taking her rank as a fifth rate power." Non-slaveholders of the South! fail not to support the papers--the Southern papers--that support your interests. Chief amongst those papers are the St. Louis (Mo.) _Democrat_, the _National Era_, published in Washington City, D. C., the Baltimore _Clipper_, the Wheeling (Va.) _Intelligencer_, and the Wellsburg (Va.) _Herald_. A RIGHT FEELING IN THE RIGHT QUARTER. There is but one way for the oligarchy to perpetuate slavery in the Southern States, and that is by perpetuating absolute ignorance among the non-slaveholding whites. This it is quite impossible for them to do. God has scattered the seeds of knowledge throughout every portion of the South, and they are, as might have been expected, beginning to take root in her fertile soil. The following extracts from letters which have been received since we commenced writing this work, will show how powerfully the spirit of freedom is operating upon the minds of intelligent, thinking men in the slave States. A Baltimorean, writing to us awhile previous to the last Presidential election, says:-- "I see that the Trustees of the University of North Carolina have dismissed Prof. Hedrick for writing a letter in favor of Republican principles. Oh, what an inglorious source of reflection for an American citizen! To think, to know that our boasted liberty of speech is a myth, an abstraction. To see a poor professor crushed under the feet of the tyrannical magnates of slavery, for daring to speak the honest sentiments of his heart. Where is fanaticism now, North or South? Oh, my country, my country, whither art thou tending? Truly we have fallen upon degenerate days. God grant that they may not be like those of ancient Greece and Rome, the forerunners of our country's ruin." In a letter under date of November 1, 1856, a friend who resides in the eastern part of North Carolina, says:--