Sir,—I accept the nomination tendered me by the Convention over which you presided, and of which I am formally apprised in the letter of yourself and others, acting as a Committee of the Convention for that purpose.

The declaration of principles and sentiments which accompanies your letter meets my approval; and it shall be my care not to violate or disregard it in any part.

Imploring the assistance of Divine Providence, and with due regard to the views and feelings of all who were represented in the Convention; to the rights of all the States and Territories, and people of the nation; to the inviolability of the Constitution, and the perpetual union, harmony, and prosperity of all,—I am most happy to co-operate for the practical success of the principles declared by the Convention.

Your obliged friend and fellow-citizen,

Abraham Lincoln.

In the mean time the National Democratic Convention had met at Charleston, S.C., and split in twain. The South utterly repudiated Mr. Douglas's new heresy; and Mr. Douglas insisted that the whole party ought to become heretics with him, and, turning their backs on the Dred-Scott Decision and the Cincinnati Platform, give up slavery in the Territories to the tender mercies of "squatter sovereignty" and "unfriendly legislation." Neither party to the controversy would be satisfied with a simple re-affirmation of the Cincinnati Platform; for under it Mr. Douglas could go to the North and say that it meant "squatter sovereignty," and Mr. Breckinridge could go to the South and say that it meant Congressional protection to slavery. In fact, it meant neither, and said neither, but declared, in plain English words, that Congress had no power to interfere with slavery in the Territories; and that, when the Territories were about to become States, they had all power to settle the question for themselves. Gen. B. F. Butler of Massachusetts proposed to heal the ominous divisions in the Convention by the re-adoption of that clear and emphatic provision; but his voice was soon drowned in the clamors of the fiercer disputants. The differences were irreconcilable. Mr. Douglas's friends had come there determined to nominate him at any cost; and, in order to nominate him, they dared not concede the platform to the South. A majority of the Committee on Resolutions reported the Cincinnati Platform, with the Southern interpretation of it; and the minority reported the same platform with a recitation concerning the "differences of opinion" "in the Democratic party," and a pledge to abide by the decision of the Supreme Court "on the questions of constitutional law,"—a pledge supposed to be of little value, since those who gave it were that moment in the very act of repudiating the only decision the Court had ever rendered. The minority report was adopted after a protracted and acrimonious debate, by a vote of one hundred and sixty-five to one hundred and thirty-eight. Thereupon the Southern delegates, most of them under instructions from their State conventions, withdrew, and organized themselves into a separate convention. The remaining delegates, called "the rump" by their Democratic adversaries, proceeded to ballot for a candidate for President, and voted fifty-seven times without effecting a nomination. Mr. Douglas, of course, received the highest number of votes; but, the old two-thirds rule being in force, he failed of a nomination. Mr. Guthrie of Kentucky was his principal competitor; but at one time and another Mr. Hunter of Virginia, Gen. Lane of Oregon, and Mr. Johnson of Tennessee, received flattering and creditable votes. After the fifty-seventh ballot, the Convention adjourned to meet at Baltimore on the 18th of June.

The seceders met in another hall, adopted the majority platform, as the adhering delegates had adopted the minority platform, and then adjourned to meet at Richmond on the second Monday in June. Faint hopes of accommodation were still entertained; and, when the seceders met at Richmond, they adjourned again to Baltimore, and the 28th of June.

The Douglas Convention, assuming to be the regular one, had invited the Southern States to fill up the vacant seats which belonged to them; but, when the new delegates appeared, they were met with the apprehension that their votes might not be perfectly secure for Mr. Douglas, and were therefore, in many instances, lawlessly excluded. This was the signal for another secession: the Border States withdrew; Mr. Butler and the Massachusetts delegation withdrew; Mr. Cushing deserted the chair, and took that of the rival Convention. The "regular" Convention, it was said, was now "the rump of a rump."

On the first ballot for a candidate, Mr. Douglas had 173 1/2 votes; Mr. Guthrie, 10; Mr. Breckinridge, 5; and 3 were scattered. On the second ballot, Mr. Douglas had 181 1/2; Mr. Breckinridge, 5; and Mr. Guthrie, 5 1/2. It was plain that under the two-thirds rule no nomination could be made here. Neither Mr. Douglas nor any one else could receive two-thirds of a full convention. It was therefore resolved that Mr. Douglas, "having received two-thirds of all the votes given in this Convention," should be declared the nominee. Mr. Fitzpatrick of Alabama was nominated for Vice-President, but declined to stand; and Mr. Johnson of Georgia was substituted for him by the Douglas "National Committee."

In the seceders' Convention, twenty-one States were represented more or less fully. It had no trouble in selecting a candidate. John C. Breckinridge of Kentucky and Joseph Lane of Oregon were unanimously nominated for the offices of President and Vice-President.