These utterances show elements in the atmosphere when Mr. Sumner spoke. With many there was grief mingled with indignation, while others who accepted the result felt a new burden added to the war. Something was needed as a rally. SPEECH. MR. PRESIDENT,--Every principle of International Law, when justly and authoritatively settled, is a safeguard of peace and a landmark of civilization. It constitutes part of that code which is the supreme law, above all municipal laws, binding the whole Commonwealth of Nations. Such a settlement may be by a general Congress of Nations, as at Munster, Vienna, or Paris; or it may be through the general accord of treaties; or it may be by a precedent established under such conspicuous circumstances, with all nations as assenting witnesses, that it becomes at once a commanding rule of international conduct. Especially is this the case, if disturbing pretensions, long maintained to the detriment of civilization, are practically renounced. Without congress or treaty, such a precedent is now established. Surely it ought to be considered and understood in its true character. Undertaking to explain it, I shall speak for myself alone; but I shall speak frankly, according to the wise freedom of public debate, and the plain teachings of history on the question involved, trusting sincerely that what I utter may contribute something to elevate the honest patriotism of the country, and perhaps to secure that tranquil judgment under which this precedent will be the herald, if not the guardian, of international harmony. * * * * * Two old men and two younger associates, recently taken from the British mail packet Trent, on the high seas, by order of Captain Wilkes of the United States Navy, and afterwards detained in custody at Fort Warren, are liberated and placed at the disposition of the British Government. This is at the instance of that Government, made on the assumption that the original capture was an act of violence constituting an affront to the British flag, and a violation of International Law. This is a simple outline of the facts. To appreciate the value of the precedent, other matters must be brought into view.