"The time has been, Mr. Chairman, when a colored man could scarcely look a white man in the face without trembling, owing to his education and experience. I am not here to boast; but I may say, in view of what I have seen and heard during the last five years, as I said in the Representatives' Hall a few months ago, that our lot is a common one, and the sooner we shall so regard it, and buckle on our knapsacks and shoulder our muskets, and resolve that we will be free, the better for you as well as for me. The disgrace that once rested upon the head of the black man, now hovers over the head of every man and woman whom I have the honor to address this evening, just in proportion as they shall dare to stand erect before the oligarchy of slaveholders in the southern portion of our country; and God hasten forward the day when not only Music Hall, but every other hall in the city of Boston, the Athens of America, shall be made eloquent with tones that shall speak, as man has never before spoken in this country, for the cause of universal freedom. If the result of that speaking must be bloodshed, be it so! If it must be the dissolution of the Union, be it so! If it must be that we must walk over or through the American church, be it so! The time has come when, if you value your own freedom, James Buchanan must be hung in effigy, and such men as Dr. Nehemiah Adams must be put in the pillory of public disgrace and contempt; and then Massachusetts will cease to be a hissing and a by-word in every other country." GEORGE T. DOWNING. The tall, fine figure, manly walk, striking profile, and piercing eye of George T. Downing would attract attention in any community, even where he is unknown. Possessing remarkable talents, finely educated, a keen observer, and devoted to the freedom and elevation of his race, he has long been looked upon as a representative man. A good debater, quick to take advantage of the weak points of an opponent, forcible in speech, and a natural orator, Mr. Downing is always admired as a speaker. Chosen president of the convention of colored citizens which assembled in Boston on the first of August, 1859, he delivered an impressive and eloquent opening address, of which we regret that we can give only an extract. He said,--