David Dudley Field, Esq., who had been selected by the Committee as Chairman of the meeting, introduced Mr. Sumner to the audience in the following words. “LADIES AND GENTLEMEN,--At no former period in the history of the country has the condition of its foreign relations been so important and so critical as it is at this moment. In what agony of mortal struggle this nation has passed the last two years we all know. A rebellion of unparalleled extent, of indescribable enormity, without any justifiable cause, without even a decent pretext, stimulated by the bad passions which a barbarous institution had originated, and encouraged by expected and promised aid from false men among ourselves, has filled the land with desolation and mourning. During this struggle it has been our misfortune to encounter the evil disposition of the two nations of Western Europe with which we are most closely associated by ties of blood, common history, and mutual commerce. Perhaps I ought to have said the evil disposition of the governments, rather than of the nations; for in France the people have no voice, and we know only the imperial will and policy, while in England the masses have no powers, the House of Commons being elected by a fraction of the people, and the aristocratic classes being against us from dislike to the freedom of our institutions, and the mercantile classes from the most sordid motives of private gain. To what extent this evil disposition has been carried, what causes have stimulated it, in what acts it has manifested itself, and what consequences may be expected to follow from it in future, will be explained by the distinguished orator who is to address you this evening. His position as Chairman of the Senate Committee on Foreign Relations has given him an acquaintance with the subject equal, if not superior, to that of any other person in the country. He needs no introduction from me. His name is an introduction and a passport in any free community between the Atlantic and the Pacific seas; therefore, without saying more, I will give way for CHARLES SUMNER, of Massachusetts.” Amid the most marked demonstrations of satisfaction, expressed frequently by long-continued applause and hearty cheers, Mr. Sumner proceeded in the delivery of his discourse. The meeting adjourned about an hour before midnight. Three New York newspapers and two in Boston printed the entire speech on the day following its delivery. SPEECH.