The undersigned avails himself of the occasion to renew to Mr. Fox the assurance of his distinguished consideration. JOHN FORSYTH. DEPARTMENT OF STATE, _Washington, March 1, 1838_. His Excellency EDWARD KENT, _Governor of the State of Maine_. SIR: The discussions between the Federal Government and that of Great Britain in respect to the northeastern boundary of the United States have arrived at a stage in which the President thinks it due to the State of Maine and necessary to the intelligent action of the General Government to take the sense of that State in regard to the expediency of opening a direct negotiation for the establishment of a conventional line, and if it should deem an attempt to adjust the matter of controversy in that form advisable, then to ask its assent to the same. With this view and to place the government of Maine in full possession of the present state of the negotiation and of all the discussions that have been had upon the subject, the accompanying documents are communicated, which, taken in connection with those heretofore transmitted, will be found to contain that information. The principles which have hitherto governed every successive Administration of the Federal Government in respect to its powers and duties in the matter are-- First. That it has power to settle the boundary line in question with Great Britain upon the principles and according to the stipulations of the treaty of 1783, either by direct negotiation or, in case of ascertained inability to do so, by arbitration, and that it is its duty to make all proper efforts to accomplish this object by one or the other of those means. Second. That the General Government is not competent to negotiate, unless, perhaps, on grounds of imperious public necessity, a conventional line involving a cession of territory to which the State of Maine is entitled, or the exchange thereof for other territory not included within the limits of that State according to the true construction of the treaty, without the consent of the State. In these views of his predecessors in office the President fully concurs, and it is his design to continue to act upon them. The attention of the Federal Government has, of course, in the first instance been directed to efforts to settle the treaty line. A historical outline of the measures which have been successively taken by it to that end may be useful to the government of Maine in coming to a conclusion on the proposition now submitted. It will, however, be unnecessary here to do more than advert to the cardinal features of this protracted negotiation.