Frankness is not a virtue of our opponents, else we should have this issue between us more fairly stated. But you will not be deceived. You will see, that, amidst all disguises and subterfuges, the great question perpetually recurs: Are you for Freedom, or are you for Slavery? On this single question you are to vote; and no cry of “Disunion” can change the issue. Are you for Freedom in the Territories? Are you for a National Government administered in the spirit of the Fathers? Are you for the prostration of the Slave Oligarchy which now rules the country? Vain is the attempt to interpose other questions, even that of the Union itself; and vain is the attempt to separate the combatants. The ancient armies of Rome and Carthage fought on, unconscious of an earthquake which upheaved mountains, toppled down cities, and turned the course of rivers. But the animosity between Freedom and Slavery is not less implacable and self-forgetful. It can end only with the triumph of Freedom. Freedom, which is the breath of God, is a great leveller; but it raises where it levels. Slavery, which is the breath of Satan, is also a great leveller; but it degrades everything, carrying with it master as well as slave. Choose ye between them; and remember that your first duty is to stand up straight, and not bend before absurd threats, whether uttered at the South or repeated here in Massachusetts. Let people cry, “Disunion.” We know what the cry means, and we answer back: The Union shall be preserved, and made more precious by its consecration to Freedom. NO POPULAR SOVEREIGNTY IN TERRITORIES CAN ESTABLISH SLAVERY. SPEECH IN THE MECHANICS’ HALL, WORCESTER, NOVEMBER 1, 1860. This speech was made on the eve of the Presidential election, with the special purpose of sustaining Hon. Goldsmith F. Bailey, the Republican candidate for Congress in the Worcester District, against Hon. Eli Thayer, the previous Representative, who, failing to obtain the Republican nomination, became an Independent candidate. When it was known that Mr. Sumner had accepted an invitation from the Republican Committee to speak in the District, Mr. Thayer addressed him a letter, proposing a public discussion together on an evening named. To this challenge Mr. Sumner promptly replied in the following letter. BOSTON, October 30, 1860. MY DEAR SIR,--I make haste to acknowledge your favor of 29th October, that I may not seem for a moment to fail in any courtesy towards you. I have been invited by the Republicans of Worcester to address them in support of their candidate, and have not felt at liberty to decline the invitation. But I should not like to take part in any controversy with an Opposition candidate, even had I been invited to do so. Accept the good wishes which I sincerely cherish for your personal welfare, and believe me, dear Sir, Faithfully yours,