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° 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° 25'. The line so drawn
crosses the Southwest Branch once before it reaches the parallel of
latitude 46° 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° 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.