Sir Charles further stated that if the President was persuaded that he could carry out the principle of surveying he had proposed without the consent of Maine, and if no hope remained, as was alleged by Mr. McLane, of overcoming the constitutional difficulty in any other way until at least this proposition should have been tried and have failed, His Majesty's Government, foregoing their own doubts on the subject, were ready to acquiesce in the proceeding proposed by the President if that proceeding could be carried into effect in a manner not otherwise objectionable; that "His Majesty's Government would consider it desirable that the principles on which the new commissioners would have to conduct their survey should be settled beforehand by a special convention between the two Governments;" that there was, indeed, one preliminary question upon which it was obviously necessary the two Governments should agree before the commission could begin their survey with any chance of success, viz, What is the precise meaning to be attached to the words employed in the treaty to define the highlands which the commissioners are to seek for? that those highlands are to be distinguished from other highlands by the rivers flowing from them, and those distinguishing rivers to be known from others by the situation of their mouths; that with respect to the rivers flowing south into the Atlantic Ocean a difference of opinion existed between the two Governments; that whilst the American Government contended that rivers falling into the Bay of Fundy were, the British Government contended that they were not, for the purposes of the treaty, rivers falling into the Atlantic Ocean, and that the views and arguments of the British Government on this point had been confirmed by an impartial authority selected by the common consent of the two Governments, who was of opinion that the rivers St. John and Restigouche were not Atlantic rivers within the meaning of the treaty, and that His Majesty's Government therefore trusted that the American Cabinet would concur with that of His Majesty in deciding "that the Atlantic rivers which are to guide the commissioners in searching for the highlands described in the treaty are those which fall into the sea to the westward of the mouth of the river St. Croix;" that a clear agreement on this point must be an indispensable preliminary to the establishment of any new commission of survey; that till this point be decided no survey of commissioners could lead to a useful result, but that its decision turns upon the interpretation of the words of a treaty, and not upon the operations of surveyors; and His Majesty's Government, having once submitted it, in common with other points, to the judgment of an impartial arbiter, by whose award they had declared themselves ready to abide, could not consent to refer it to any other arbitration.