It was ascertained also, in accordance with the provisions of the treaty, by a triangulation of the country toward the highlands dividing the waters of the St. Lawrence and of the St. John, that more than 7 miles intervened between the point selected on the Northwest Branch and the crest of the dividing ridge.  A large iron monument was afterwards erected on the point thus selected, and the space around was cleared and sown with grass seed.  It is a short distance below the outlet of Lake Ishaganalshegeck.

The outlet of Lake Pohenagamook and the point on the Northwest Branch designated by the treaty having been thus ascertained and marked, in the spring of 1844 a straight line was run between them.  Along that line, which passes entirely through forest, monuments were erected at every mile, at the crossings of the principal streams and rivers, and at the tops of those hills where a transit instrument had been set up to test the straightness of the line.

As soon as the parallel of latitude 46 deg. 25’ had been determined on the Southwest Branch, in the early part of the summer of 1844, a straight line was drawn from the boundary point on the Northwest Branch to a large monument erected on the left bank of the Southwest Branch where it is intersected by the parallel of latitude 46 deg. 25’.  The line so drawn crosses the Southwest Branch once before it reaches the parallel of latitude 46 deg. 25’, and at about half a mile distance from that parallel.  There also a large monument has been set up on the left bank.

From the intersection of the parallel 46 deg. 25’ the boundary ascends the Southwest Branch, passes through a lake near its head, and so up a small stream which falls into the lake from the west to the source of that stream, which has been selected as the source of the Southwest Branch.

On the Southwest Branch there are two principal forks, at each of which two monuments have been erected, one on each bank of the river immediately above the forks and upon the branch established as the boundary.  The maps point out their positions.  At the mouth of the small stream selected as the source of the Southwest Branch a monument has been erected upon a delta formed by two small outlets.  Above those outlets three other monuments have been placed at intervals upon the same stream.

Upon the crest of the dividing ridge, very close to the source of the Southwest Branch, a large monument has been erected.  It is the first point in the highlands, and from it the boundary runs along the crest in a southerly direction, passing near to the southeastern shore of the Portage Lake, and so on to a large monument erected on a small eminence on the east side of the Kennebec road.  Thence it passes through a dwelling house called Tachereau’s, which was standing there at the time the line was run; so, by a tortuous course, it runs to the top of Sandy Stream Mountain; thence, inclining to the southwest,