I wish to say a word about the Territories. What great harm would be done if all the Territories were thrown open to slavery? By the decision of the Supreme Court in the Dred Scott case, they are open already. But in the greater part of them slavery cannot exist at all. New Mexico has a slave code. So have the Cherokee and other Indian tribes; and yet slavery does not and cannot flourish among them. It cannot make head against the obstacles which oppose it, and yet you will attack it even there. If you do so, civil war is inevitable. But what mischief is done if slavery does go into the Territories? It will not add another to the degraded race of Africans. It is a blessing to the slave if he may be permitted to go with his master into these new Territories. In the old slave States he is compelled to work in gangs under the whip of a driver, with no one to look after his health or comfort. Take him into one of these new Territories, and there are one hundred white men and women to protect each individual of his race, and to see that he suffers no wrong. It is a blessing to take him out of the plantation gangs, and to place him in a new country. Then why not let him go there and live in peace? Your zeal to exclude slavery from the Territories only injures the African race. If there is a good substantial reason for this exclusion I shall be glad to hear it. Up to this time I have heard no good reason stated. Although I have declared myself a Democrat, in this Conference I am no party man. Show me any good reason for not adopting these proposals of amendment and I will oppose them. But until that reason is shown they will receive my support. So far as I can judge, no argument has been proposed here against these propositions which is not of a partisan character. The rights which the slave States now ask to have us recognize, are guaranteed to them by the Constitution as it now stands. We are giving them nothing new. Every lawyer is familiar with the rule of constitutional construction, that all the rights not expressly granted to the General Government are reserved to the States. Let us carry this principle into effect now. It is all that we are asked to do. Let us do something. Let us amend these propositions; make them as unobjectionable as we can, and send them to Congress. Let us urge Congress and the country to adopt them. In their adoption there is safety; there is great danger in their rejection. Mr. POLLOCK obtained the floor, and at twelve o'clock the Conference adjourned to ten o'clock to-morrow. FIFTEENTH DAY. WASHINGTON, FRIDAY, _February 22d, 1861._ The Conference was called to order by President TYLER, at 10 o'clock A.M., and prayer was offered by Rev. Dr. SUNDERLAND. The Journal of yesterday was read, corrected, and approved.