"I have always regarded duelling as the lingering relic of a barbarous civilization, which the law of the country has branded as a crime. While, therefore, I religiously believe in the right of self-defence in its broadest sense, the law of my country and the matured convictions of my whole life alike forbid me to meet you for the purpose indicated in your letter. "Your obedient servant, "HENRY WILSON." This prompt and emphatic response, declining to fight a duel, but at the same time avowing his readiness to maintain the right of self-defence, was most enthusiastically approved and applauded by the people and presses of the North, and he received many letters, from men of the highest character, warmly commending his noble and dignified course. On the 13th of June, General Wilson made a full and elaborate reply to Mr. Butler, and in defence of Mr. Sumner. This speech and his speeches on the bill to admit Kansas, his speech in defence of the acts of Col. Fremont, and against using the army to enforce the acts of the territorial legislature of Kansas, were largely circulated through the country. On the adjournment of Congress, General Wilson entered into the Presidential campaign, and gave all his energies to secure the triumph of the Republican cause. During the sessions of 1856-7-8 and 1858-9, General Wilson was in constant attendance upon Congress, and his duties, owing to the prolonged absence of his colleague, were very arduous and pressing. In those sessions he took his full share of labor in the committee rooms, on the floor of the Senate, and on matters of legislative action. He took part in the debates during these sessions, upon all questions of importance, and on most of the questions before the Senate, he delivered elaborate speeches. Those upon the affairs of Kansas exhibit an amount of information, concerning that territory, surpassed by no other member of either House of Congress, and his speeches on the Treasury Note bill, the expenses of the Government, the revenue collection appropriations, the tariff, the President's Message, and the Pacific Railroad, are remarkable for fullness and accuracy of facts, and clearness and force of statement. His speech in March, 1850, in reply to Mr. Hammond of South Carolina, is one of the most effective speeches ever delivered in Congress, in defence of free labor. It is full of facts and points of great power, and few speeches ever made in Congress have had a wider circulation, or received warmer approval, in the free States. Mr. Hammond characterized the manual laborers as "slaves"--the "mud-sills" of society. This extract is quoted from General Wilson's reply: