REMARKS IN THE SENATE, ON A MILITARY ORDER IN MISSOURI, DECEMBER 4, 1861. The first regular session of Congress, after the breaking out of the Rebellion, opened on Monday, December 2, 1861. Mr. Sumner renewed at once his movement against Slavery. December 4th he submitted the following resolution, as a mode of calling attention to an abuse, and of obtaining a hearing while he exposed it. “_Resolved_, That the Secretary of War be requested to furnish to the Senate copies of any General Orders in the military department of Missouri relating to fugitive slaves.” On this he spoke briefly. MR. PRESIDENT,--My attention has been called, by letter from St. Louis, to certain General Orders purporting to be by Major-General Halleck, in command of the Department of Missouri, relating to fugitive slaves, wherein it is directed that such persons shall not be received within his camps, or within the lines of his forces when on march, and that any such persons now within such lines shall be thrust out; and the reason strangely assigned for this order is, that such fugitive slaves will carry information to the Rebels. It is difficult to speak of an order like this, and keep within bounds. Beside being irrational and inhuman on its face, it practically authorizes the surrender of fugitive slaves beyond any constitutional obligation. Such an order must naturally be disheartening to our soldiers, and it gives a bad name to our country, both at home and abroad. General Halleck is reported to be a good tactician; but an act like this, with which he chooses to inaugurate his command, does not give assurance of great success hereafter. He may be expert in details of military science; but something more is needed now. Common sympathy, common humanity, and common sense must prevail in the conduct of this war. I take the liberty of saying--and I wish that my words may reach his distant head-quarters--that every fugitive slave he surrenders will hereafter rise in judgment against him with a shame which no possible victory can remove. A letter from St. Louis, written the day after these remarks, shows the necessity for them, and also how promptly they reached Missouri, thanks to the telegraph. “We thank you most kindly for your motion yesterday, and I beg to inclose you some extracts which will show you the workings of that unfortunate Order No. 3. The slaves advertised, in some instances, to my own knowledge, belong to Secessionists in Price’s army. For that matter, they may all belong to that class of people. Is it not an inhuman act for these poor people to be made outlaws for no crime, only that they refused to join their traitor masters in onslaught on our beneficent Government?” SLAVERY AND THE BLACK CODE IN THE DISTRICT OF COLUMBIA.