A few trifling errors into which Mr. Thompson has fallen, we feel bound to correct; in proceeding to which, however, we cannot but remark that considering the shortness of the time which Mr. T. spent among us, the amount of labor which he performed in lecturing, addressing conventions, debating, &c. &c. and the large portion of his time necessarily consumed in social intercourse with his extensive circle of acquaintance--nay, the very considerable share of it which was required for the mere answering of applications to lecture, which came from every quarter; we are actually astonished at the extent and minuteness of his information, the mass of facts and documents which he has contrived to collect, and what is more, at the general--the almost uniform accuracy of his knowledge of American affairs. The reader has seen how completely furnished he was, how armed at all points, and ever ready to lay his hand on the very weapon which was needed at any stage of the conflict, whether to parry the blow aimed at himself, or to send home to his antagonist's bosom, a vigorous thrust which neither the dexterity of sophistry could elude, nor the buckler of brazen falsehood ward off. Indeed the mass of his documents, and the readiness and aptness to the purpose with which he used them, seems to have been one of the chief causes of the bitter vexation which his opponent continually betrays. That he should have fallen into a few mistakes is nothing surprising--that he should have fallen into _so_ few, is indeed wonderful, and proves the industry and diligence with which he labored at times when from the fatiguing nature, and great amount of his public efforts, one would have supposed he must have been obliged to indulge in perfect repose. But to the errors. He stated the first evening, page 12, that there were now, exclusive of the publications of the Anti-Slavery Society, one hundred newspapers boldly advocating the principles of abolition. 'There are,' says the Emancipator, 'about that number friendly to our cause, and that occasionally speak in our behalf, but not that _boldly advocate_ our principles,' or, as perhaps would be the more accurate mode of expression, that do not boldly advocate our principles, _in their application_ to the subject to which we apply them. On the second evening, Mr. Thompson in speaking of the New York State Anti-Slavery Convention, page 30, said there were 600 delegates at Utica the first day, and that when driven away by a mob, these went to Peterboro', and were there joined by 400 more, making 1000 in all. In reality, it was estimated that nearly or quite 1000 went to Utica, and of these only about 400 went to Peterboro'. The error is indeed immaterial.