Mr. George Thompson, the English anti-slavery orator, delivered an address in the House of Representatives, to a large audience, April 6th, 1864. Among the distinguished persons present was President Lincoln, who was greatly interested. The following morning, Mr. Thompson and party, consisting of Rev. John Pierpont, Oliver Johnson, formerly President of the Anti-Slavery Society of New York, and the Hon. Lewis Clephane, of Washington, called at the White House. The President was alone when their names were announced, with the exception of myself. Dropping all business, he ordered the party to be immediately admitted. Greeting them very cordially, the gentlemen took seats, and Mr. Thompson commenced conversation by referring to the condition of public sentiment in England in regard to the great conflict the nation was passing through. He said the aristocracy and the “money interest” were desirous of seeing the Union broken up, but that the great heart of the masses beat in sympathy with the North. They instinctively felt that the cause of liberty was bound up with our success in putting down the Rebellion, and the struggle was being watched with the deepest anxiety. Mr. Lincoln thereupon said: “Mr. Thompson, the people of Great Britain, and of other foreign governments, were in one great error in reference to this conflict. They seemed to think that, the moment I was President, I had the power to abolish slavery, forgetting that, before I could have any power whatever, I had to take the oath to support the Constitution of the United States, and execute the laws as I found them. When the Rebellion broke out, my duty did not admit of a question. That was, first, by all strictly lawful means to endeavor to maintain the integrity of the government. I did not consider that I had a _right_ to touch the ‘State’ institution of ‘Slavery’ until all other measures for restoring the Union had failed. The paramount idea of the constitution is the preservation of the Union. It may not be specified in so many words, but that this was the idea of its founders is evident; for, without the Union, the constitution would be worthless. It seems clear, then, that in the last extremity, if any local institution threatened the existence of the Union, the Executive could not hesitate as to his duty. In our case, the moment came when I felt that slavery must die that the nation might live! I have sometimes used the illustration in this connection of a man with a diseased limb, and his surgeon. So long as there is a chance of the patient’s restoration, the surgeon is solemnly bound to try to save both life _and_ limb; but when the crisis comes, and the limb must be sacrificed as the only chance of saving the life, no honest man will hesitate.