"And that all disputes which might arise in future on the subject of the boundaries of the said United States may be prevented it is hereby agreed and declared that the following are and shall be their boundaries, viz: From the northwest angle of Nova Scotia, viz, that angle which is formed by a line drawn due north from the source of St. Croix River to the highlands; along the said highlands which divide those rivers that empty themselves into the river St. Lawrence from those which fall into the Atlantic Ocean to the northwesternmost head of Connecticut River; thence down along the middle of that river to the forty-fifth degree of north latitude; from thence by a line due west on said latitude until it strikes the river Iroquois, or Cataraquy; thence along the middle of said river into Lake Ontario; through the middle of said lake until it strikes the communication by water between that lake and Lake Brie; thence along the middle of said communication into Lake Erie through the middle of said lake until it arrives at the water communication between that lake and Lake Huron; thence along the middle of said water communication into the Lake Huron; thence through the middle of said lake to the water communication between that lake and Lake Superior; thence through Lake Superior northward of the Isles Royal and Phelipeaux to the Long Lake; thence through the middle of said Long Lake and the water communication between it and the Lake of the Woods to the said Lake of the Woods; thence through the said lake to the most northwestern point thereof, and from thence on a due west course to the river Mississippi; thence by a line to be drawn along the middle of the said river Mississippi until it shall intersect the northernmost part of the thirty-first degree of north latitude; south by a line to be drawn due east from the determination of the line last mentioned in the latitude of 31° north of the equator to the middle of the river Apalachicola, or Catahouche; thence along the middle thereof to its junction with the Flint River; thence straight to the head of St. Marys River, and thence down along the middle of St. Marys River to the Atlantic Ocean; east by a line to be drawn along the middle of the river St. Croix from its mouth in the Bay of Fundy to its source and from its source directly north to the aforesaid highlands which divide the rivers that fall into the Atlantic Ocean from those which fall into the river St. Lawrence; comprehending all islands within 20 leagues of any part of the shores of the United States and lying between lines to be drawn due east from the points where the aforesaid boundaries between Nova Scotia on the one part and East Florida on the other shall respectively touch the Bay of Fundy and the Atlantic Ocean, excepting such islands as now are or heretofore have been within the limits of the said Province of Nova Scotia."
So far as the present question is concerned, five points of discussion are presented by this article of the treaty of 1783:
I. What stream is to be understood by the name of the river St. Croix?
II. The determination of the line due north from the source of that river.
III. What is the position of the northwest angle of Nova Scotia?
IV. The delineation of the line passing through the highlands from that angle to the northwest head of Connecticut River.
V. What is to be considered as the northwestern head of Connecticut River?
I.—RIVER ST. CROIX.
Doubts in respect to the particular river intended to be understood by the name of the St. Croix having arisen, an article was inserted in the treaty of commerce signed in London in November, 1794, by Lord Grenville on the part of Great Britain and by John Jay on the part of the United States.[41] This article, the fifth of that treaty, provided for the appointment of a joint commission with full powers to decide that question. This commission was constituted in conformity, and the award was accepted by both Governments.[42] The river designated in this award became thenceforth the true St. Croix, however erroneous may have been the grounds on which it was decided so to be. When, therefore, in the fourth article of the treaty of Ghent it is declared that the due north line from the source of the St. Croix has not been surveyed, and when in this and the other articles of the same treaty all other uncertain parts of the boundary are recited, the validity of the decision of the commissioners under the fifth article of Jay's treaty is virtually acknowledged. Nay, more; the acknowledgment is completed by the stipulation in the second article of the treaty of Ghent that "all territory, places, and possessions taken by either party during the war," with certain exceptions, shall be forthwith restored to their previous possessors.[43] The only exceptions are the islands in Passamaquoddy Bay; and had it been believed that any uncertainty in respect to the adjacent territory existed it would not have been neglected. Nay, more; all the settlements lying within the line claimed by Great Britain before the commission created by the treaty of 1794 had been taken, and were in her actual possession at the time the treaty of Ghent took effect, and were forthwith restored to the jurisdiction of the United States. When, also, it became necessary to proceed to the investigation of the second point of the discussion, the agents and surveyors of both parties proceeded as a matter of course to the point marked in 1798 as the source of the St. Croix.[44] This point is therefore fixed and established beyond the possibility of cavil, and the faith of both Governments is pledged that it shall not be disturbed.
II.—DUE NORTH LINE FROM THE SOURCE OF THE ST. CROIX.