Though, happily, compromise is no longer openly mentioned, yet it insinuates itself in this debate. In former times it took the shape of barefaced concession, as in the admission of Missouri with Slavery, in the annexion of Texas with Slavery, the waiver of the prohibition of Slavery in the Territories, the atrocious bill for the reënslavement of fugitives, and the opening of Kansas to Slavery, first by the Kansas Bill, and then by the Lecompton Constitution. In each of these cases there was concession to Slavery which history records with shame, and it was by this that your wicked slaveholding conspiracy waxed confident and strong, till at last it became ripe for war. And now it is proposed, as an agency in the suppression of the Rebellion, to make an end of Slavery. By proclamation of the President, all slaves in certain States and designated parts of States are declared free. Of course this proclamation is a war measure, rendered just and necessary by exigencies of war. As such, it is summary and instant in operation, not prospective or procrastinating. A proclamation of Prospective Emancipation would have been an absurdity,--like a proclamation of a prospective battle, where not a blow was to be struck or a cannon pointed before 1876, unless, meanwhile, the enemy desired it. What is done in war must be done promptly, except, perhaps, under the policy of defence. Gradualism is delay, and delay is the betrayal of victory. If you would be triumphant, strike quickly, let your blows be felt at once, without notice or premonition, and especially without time for resistance or debate. Time deserts all who do not appreciate its value. Strike promptly, and time becomes your invaluable ally; strike slowly, gradually, prospectively, and time goes over to the enemy. But every argument for the instant carrying out of the Proclamation, every consideration in favor of despatch in war, is especially applicable to whatever is done by Congress as a war measure. In a period of peace Congress might fitly consider whether Emancipation should be immediate or prospective, and we could listen with patience to the instances adduced by the Senator from Wisconsin [Mr. DOOLITTLE] in favor of delay,--to the case of Pennsylvania, and to the case of New York, where slaves were tardily admitted to their birthright. Such arguments, though to my judgment of little value at any time, might then be legitimate. But now, when we are considering how to put down the Rebellion, they are not even legitimate. There is but one way to put down the Rebellion, and that is _instant action_; and all that is done, whether in the field, in the Cabinet, or in Congress, must partake of this character. Whatever is postponed for twenty years, or ten years, may seem abstractly politic or wise; but it is in no sense a war measure, nor can it contribute essentially to the suppression of the Rebellion.