To the eastward of Lake Temiscouata, on the other hand, the country has the aspect of having once been a table-land, elevated on the average about 1,700 feet above the level of the sea, and of having been washed by some mighty flood, which, wearing away the softer rocks, had cut it into valleys, forming a complex system incapable of being described in words and only to be understood by inspection of a map. 2.--COMPARISON OF THE ELEVATIONS OF THE BOUNDARY LINE CLAIMED BY THE UNITED STATES WITH THOSE OF THE "AXIS OF MAXIMUM ELEVATION" OF MESSRS. FEATHERSTONHAUGH AND MUDGE. For the purpose of exhibiting the relative claims of the two lines to the exclusive epithet of "the highlands" in the most clear and definite manner, each of them will be considered as divided into three portions, which will be contrasted with each other by pairs The first portion of each of the lines is that which lies nearest to the point of bifurcation, the residue of the American line is divided at the source of the Ouelle, the remainder of the line of Messrs. Featherstonhaugh and Mudge at that of the Aroostook Metjarmette portage is taken as the point of bifurcation, whence waters run to the Penobscot, the St. John, and the St. Lawrence. On the American line from the Metjarmette portage to Lake Etchemm-- Feet The maximum height is 1,718 The minimum height is 1,218 The minimum measured height is that of Lake Etchemm, which is lower than the actual source of that stream, and whose omission as not upon the dividing ridge would make the minimum greater. This height was determined by the parties of A. Talcott, esq, by two distinct and separate sets of observations, one of which was continued hourly for several days, and no doubt can exist that it is as accurate a measure as the barometer is capable of affording. In the report of Messrs. Featherstonhaugh and Mudge this height is set down as no more than 957 feet, but it is determined from a single observation. That it is erroneous must be considered as demonstrated. In the map presented by those gentlemen they have made use of this erroneous determination for a purpose which, even were it correct, would not be warranted, for they on its authority leave out all the symbols by which heights are represented, and substitute therefore a dotted line with the inscription "Fictitious hills of Mr. Burnham's map." The actual character of this part of the American line is an undulating country. On the line of Messrs. Featherstonhaugh and Mudge between the Metjarmette portage and the Cocumgamoc Mountains-- Feet The maximum elevation is 2,302 The minimum elevation is 987