These principles are well illustrated by some incidents of our controversy with Great Britain over the seal fisheries in Behring Sea. There was a serious dispute between the two governments as to the limits of our jurisdiction over the waters adjacent to Alaska. We maintained that it ran to the middle of Behring's Straits and from the meridian of 172 deg. to that of 193 deg. west longitude. Great Britain contended for the three-mile limit. Pending diplomatic negotiations as to this point, one of our revenue cruisers seized a Canadian vessel which was engaged in seal fishing nearly sixty miles from the Alaskan coast, and she was condemned, on a libel by the United States, by an admiralty court in Alaska. The owner in 1891 applied to the Supreme Court of the United States for a writ to prohibit the enforcement of this decree of confiscation. The Attorney-General of Canada filed in this suit papers in aid of the application, stating that he did so with the knowledge and approval of the imperial government, and that he would be represented by counsel employed by the British minister resident. The writ was refused on technical grounds, but the court, through Chief Justice Fuller, made these observations as to the merits of the cause: In this case, Her Britannic Majesty's Attorney-General of Canada has presented, with the knowledge and approval of the Imperial government of Great Britain, a suggestion on behalf of the claimant. He represents no property interest in the vessel, as is sometimes done by consuls, but only a public political interest. We are not insensible to the courtesy implied in the willingness thus manifested that this court should proceed to a decision on the main question argued for the petitioner; nor do we permit ourselves to doubt that under such circumstances the decision would receive all the consideration that the utmost good faith would require; but it is very clear that, presented as a political question merely, it would not fall within our province to determine it.... We are not to be understood, however, as underrating the weight of the argument that in a case involving private rights, the court may be obliged, if those rights are dependent upon the construction of acts of Congress or of a treaty, and the case turns upon a question, public in its nature, which has not been determined by the political departments in the form of a law specifically settling it, or authorizing the executive to do so, to render judgment, "since we have no more right to decline the jurisdiction which is given than to usurp that which is not given."[Footnote: _In re_ Cooper, 143 United States Reports, 472, 503.]