In the surveys made by direction of the commissioners under the fifth article of the treaty of Ghent the difficult character of the country had prevented any other method of exploration than that of ascending rivers to their sources. It was believed on the part of the United States that the determination of the position of these sources was sufficient for the demarcation of the line of highlands in relation to which the controversy exists, and no attempt was made to meet the British argument by the exhibition of the fact that the lines joining these sources run in some cases along ridges and in other cases pass over elevations to which in any sense of the term the epithet of "highlands" may be justly applied. The denial of this mode of determining the line of highlands by Great Britain has made it important that both the lines claimed by Great Britain and by the United States should be explored and leveled--a task which until recently had not been attempted on either part. The examination of the lines claimed by the two nations, respectively, has been in a great measure accomplished, as will be seen from the reports of the field operations of the commission, while such of these determinations as have a direct bearing on the argument will be cited in their proper place in this report. It is to be regretted that the document now under consideration exhibits many instances of an unfriendly spirit. Charges of direct and implied fraud are made, and language is used throughout that is irritating and insulting. It is fondly hoped that these passages do not express the sentiments of the British nation, as in a state of feeling such as this report indicates little hope could be entertained of an amicable adjustment of this question. Any inference to be drawn from the language of the report under consideration is contradicted by the official declarations of the British Government, and may therefore be considered as the individual act of the authors, not as the deliberate voice of the nation by which they were employed. It might have been easy to have retorted similar charges, and thus have excited in the Government of Great Britain feelings of irritation similar to those which pervaded the whole population of the United States on the reception of that report. While, however, it is due to the honor of the United States to declare that no desire of undue aggrandizement has been felt, no claim advanced beyond what a strict construction of their rights will warrant, it is trusted that the pretensions of Great Britain, however unfounded in fact or principle, have been advanced with a like disregard to mere extension of territory, and urged with the same good faith which has uniformly characterized the proceedings of the United States.