and nature of her demand for the release of Mason and Slidell, we are forced to infer that she will seize every opportunity to bring about an open rupture with the United States. And though Mr. Seward has carried the country successfully through the difficulty of the Trent, we ought to expect the presentation of demands which we can not so readily and justly meet. Indeed, enough is known of the Mexican question to suggest the most serious apprehensions of foreign war on that account. The necessity for speedily crushing the rebellion is as strong as it was at the moment when Lord Lyons made the demand for the release of the persons taken from the deck of the Trent. Is there any reason, even the slightest, to suppose that by military and naval means alone the rebellion can be crushed by the 19th of April next? Yet every day's delay gives the confederate States additional strength, and renders them in the estimation of mankind more and more worthy of recognition and independent government. Their recognition will be followed by treaties of friendship and alliance; and those treaties will give strength to the rebels and increase the embarrassments of our own government. It is the necessity of our national life that the settlement of this question should not be much longer postponed. By some means we must satisfy the world, and that speedily, that the rebellion is a failure. Nor can we much longer tender declarations of what we intend to do, or offer promises as to what we will do, in the face of the great fact that for eight months the capital of the Republic has been in a state of siege. If, in these circumstances of necessity and peril to us, the armies of the rebels be not speedily dispersed, and the leaders of the rebellion rendered desperate, will the government allow the earth to again receive seed from the hand of the slave, under the dictation of the master, and for the support of the enemies of the constitution and the Union? If there were any probability that the States would return to their allegiance, then indeed we might choose to add to our own burthens rather than interfere their internal affairs. But there is no hope whatever that the seceded States will return voluntarily to the Union. There could be no justifying cause for the emancipation of the slaves in time of peace by the action of the general government; and now it must be demanded and defended as the means by which the war is to be closed, and a permanent peace secured. If before the return of seed-time the emancipation of the slaves in several or in all of the disloyal States be declared as a military necessity, and the blacks be invited to the sea-coast where we have and may have possession, they will raise supplies for themselves, and the rebellion will come to an ignominious end, through the inability of the masters, when deprived of the services of their slaves, to procure the means of carrying on the war. * * * * * SHE SITS ALONE.