s until it was supposed
that all the branches of Indian Stream had been headed. In this work the
party was employed until the 14th September. It had now arrived at a
point where the Magalloway River should be found to the left, according
to the most authentic map of the country, especially that prepared by
the New Hampshire commissioner appointed in 1836 to explore the boundary
of that State, and accompanying that report.[90] The party accordingly
bore well north to avoid being led from the true "height of land" by the
dividing ridge between the Connecticut and Androscoggin rivers. After
crossing several small streams, it came on the afternoon of the 15th to
a rivulet about 12 feet wide running to the east, which was supposed
to be the main Magalloway. The 16th was spent in exploring it to its
source. The next day it was discovered that what had been taken for
the Magalloway was a tributary of Salmon River, a large branch of the
St. Francis, and consequently the party was considerably to the north of
the boundary.

The supply of provisions did not allow the party to retrace its steps to
the point where it had diverged from the true dividing ridge. The course
was therefore changed until it bore a little south; but it was not until
the 22d that the party found itself again on the dividing ridge, and
then upon the waters of the Magalloway.

The party reached Arnold River, or Chaudiere, above Lake Megantic, on
the 24th September. After having recruited and taken a fresh supply of
provisions from the depot established there, the party was divided into
two detachments. One returned westward to find the corner of the State
of New Hampshire as marked by the commission in 1789 appointed to trace
the boundary line.

It was there ascertained that the corner was on the true _dividing_
ridge, and not from 8 to 10 miles south, as has been erroneously
reported by the surveyor employed by the New Hampshire commissioners in
1836 and reiterated in several official papers. From the State corner
the dividing ridge was followed to where it had been previously explored
by the party. Thence a course was taken to the northeast so as to reach
the head of Lake Megantic, and thence to Lake Magaumac, where on the 8th
October the two detachments were again united. The detachment led by the
assistant, Mr. Cutts, had successfully followed the dividing ridge from
the camp of the 24th on Arnold River to this place.

It was now ascertained that the