The work remaining to be performed by the division under the direction
of the chairman of the board was as follows:
1. The completion of the survey of the line of highlands around the
sources of the Rimouski, filling up the gap left in former surveys in
the line of boundary claimed by the United States.
2. The survey of the line of highlands rising from the northern side of
the Bay of Chaleurs at its western extremity from the point visited and
measured in 1840 to its connection with the line surveyed in 1841 in the
vicinity of Lake Metis.
3. The astronomical determination of the longitude of one or more points
in the surveyed lines, in order to the compilation of a geographical map
of undeniable accuracy.
The party, which was dispatched at the earliest possible period, having
been recalled by a special messenger as soon as the signature of the
treaty of Washington was made known to the commissioner, no more than
the first of these objects was attempted, and some of the observations
that would have been considered necessary to make this survey useful as
evidence in case of a further discussion of the subject of boundary were
not completed. The expedition has, however, obtained for its results an
accurate survey of the Green River of St. John from its mouth to the
portage between it and the South Branch of the Katawamkedgwick, a survey
of that portage, and a careful chain and compass survey of the highlands
surrounding the sources of Rimouski. The first of these is connected
with the survey of the river St. John made by Major Graham; the last
was united at its two extremities with stations of the survey of 1841.
Throughout the whole of the surveys the latitudes were carefully
determined, by the methods employed during the former years, at a
sufficient number of points. The longitudes have been estimated by the
use of chronometers, but the sudden recall of the party left the latter
part of the task incomplete. Any defect arising from the latter cause
may be considered as in a great degree compensated by the connections
referred to with the work of Major Graham and the surveys of the
previous years.
The party left Portland to take the field on the 18th June, and reached
the Grand Falls of the St. John on its return on the 25th August.
The surplus stores, with the boats and camp equipage, were stored there,
and were afterwards transferred to the parties of the two other
commissioners.
A map of the operations of this division was placed on file in the State
Department on the 27th December.
The distance surveyed along Green River from its mouth to the portage is
57 miles, the length of the portage 5-1/2 miles, the distance measured
in exploration of the remaining portion of the boundary claimed by the
United States 61-1/2 miles, making in all 124 miles.