of Lake St. Francis, a distance of 81 miles.

This river was coursed by means of a compass, and whenever the nature
of the shores would permit the distances from bend to bend were either
measured with a chain or paced. Through the greater part of the stream,
however, the impediments offered by the thick and small growth near the
shores rendered this degree of minuteness impracticable and a resort to
estimating the distances by the eye, well practiced by previous actual
measurements, became necessary.

Before putting the trace of the river thus derived upon the map it was
adjusted to correspond with the results of astronomical observations for
latitude and longitude at twelve intermediate points between its mouth
and the outlet of Lake St. Francis. Its three principal lakes, viz,
Pettiquaggamas, Petteiquaggamak, and Pohenagamook, were triangulated and
sounded as exhibited by the maps of detail yet to be handed in of the
operations of this division.

A profile of the river, exhibiting the slope of the country through
which it flows, was obtained by barometric observations made at fifteen
points between its mouth and the bridge where it is intersected by the
Grand portage road.

A connection was made with Long Lake, a tributary to Lake Temiscouata,
by a chained line from a point on the St. Francis 2 miles below the
mouth of Blue River to the western shore of Long Lake, by which it was
ascertained that the shore of this lake approached within 2-3/4 miles of
the river St. Francis.

The outlet of Lake Pohenagamook was reached in a distance of 49-3/4
miles from the mouth of the St. Francis following the sinuosities of the
river on the 18th of October.

A camp was established on the southwest shore of the lake at its outlet
for the purpose of making the necessary astronomical observations to
determine the latitude and longitude of this position. Ten days were
spent here for this object, out of which we had only three nights that
were favorable for observation. These were improved as far as possible,
and the results obtained, combined with those obtained by Captain
Talcott's parties on the Northwest and Southwest branches of the St.
John, have furnished the elements for laying down upon the general map
the straight lines which show the boundary as it is required to run
between the highlands and the river St. John under the treaty of 1842.
These furnish data for an accurate exhibition of the extent of territory
included b