"As to your inquiry whether the Barnburners of New York will be represented in the Buffalo convention, I can only say that so far as representation consists in the presence of persons who will be asked to consult with the members of that body and inform them of the views of the Democracy, there will be no want of it. But representation of the formal and authoritative character which is usual in the delegated conventions of organized parties will not be possible, either from the nature of the convention itself or the circumstances in which the Democracy of this State are placed. The convention professes to be merely a mass convention, and does not aim at the indispensable characteristics of a delegated body--among which is a proportionate representation of ascertained constituents, whose numbers and relations are already known; but it will be simply a voluntary assemblage of individuals, whose relations to each other are to be for the first time established. Nor is there any person to act authoritatively for the Democracy of this State, as an organized body, until the meeting of the Utica convention on the 13th of Sept. "But all this is not deemed to be a matter of much consequence. The Buffalo convention must act with spontaneous harmony or it will fail of its objects, and the spirit of the people and the circumstances of the occasion will be likely to make it very independent of forms. If it acts with wisdom, the Utica convention will doubtless concur in its nomination for the Vice-Presidency.