MR. BRECKINRIDGE said, it was not easy to conceive of circumstances that were more embarrassing than those in which he was placed this evening. They had already taken for granted all that had been said and done on one side of the question; their minds had been already made up to oppose those conclusions to which it was his purpose to bring them. Their affections and feelings had long been engaged to his opponent in this cause; and all that he could say would necessarily have little effect in changing what he would not hesitate to call those unhappy opinions, which were long ago formed against him. Another cause of his embarrassment was, that he would be rejudged of all he might say here. What he said would be approved by one party in America, but would be disapproved of by another. In the United States they were differently situated from what the people were in this country. Here the people seemed now united on this subject, but in America they were split up into a great number of different parties, whose opinions and feelings were arrayed against each other in as great a measure as it was possible to conceive. Whatever, therefore, he might say in this country, would be disapproved of by many in the United States, while nothing was more certain than that, what was said by his opponent, would the more commend him to his friends on the other side of the Atlantic; and nothing he could say would probably lower him in the good opinion of his friends here. Hence arose the difficulty of the situation in which he (Mr. B.) found himself placed, and his unusual claim upon their patience in the course of the discussion. Still he should be unworthy of his country, he should be forgetful of the power of truth, he would have little trust in God, if he was not ready to espouse the cause which he believed to be right; and more especially if he was not ready, before a Scotish and a Christian audience, to defend the principles he adopted and avowed. He had no desire to attempt a mitigation of their hatred to slavery; and if, at a future time, he should meet in America with any one now present, he would prove to them by the friendship of those who loved and respected him, and the opposition of those who did not, that he hated slavery as much as any one of those present could do. It was said by one of the ancients, 'I am a man: I consider nothing that relates to man, foreign to me.' It was a true and noble sentiment. The fate of the most hopeless might be theirs if power could make it so; and their condition might have been that of the poorest wretch on earth if God had not smiled upon them and their ancestors as he had done. He did not wish them to interfere with slavery in America. They might interfere, but the question was, how were they to do so? He wished in the course of the discussion to bring before them facts to show, that if they did at all interfere with slavery in America, it must be done as between individuals, not as a national question.