eams, especially those forming the northwesternmost sources of the
Aroostook. These might be profitably explored another season.

2. The division under the direction of A. Talcott has, besides verifying
a part of the line of 1840 and tracing the course of Indian Stream (a
branch of the Connecticut) to its source, explored and surveyed the line
of highlands which extends from the Kennebec road to the Temiscouata
portage, and so much of the line claimed by Great Britain as extends
from the Kennebec road to the eastward as far as the head of the
Aroostook River.

In the course of this survey, without counting the lines of approach
or ground traveled over more than once, 703 miles have been passed over
and such notes taken as will form the basis of a map. Of these 703
miles, 335 are upon the lines respectively claimed as boundaries by
the Governments of the United States and Great Britain. In the course
of these surveys, in order to the geographical determination of the
position of the line, the latitudes of 54 points have been determined
by means of 114 sets of altitudes of heavenly bodies, and the sets of
subsidiary observations for time and for the determination of longitude
by chronometers amount to 245. The number of points at which
observations have been made by barometers for the purpose of determining
their altitudes is 930, of which 669 are upon the boundaries
respectively claimed by the two countries. The number of separate sets
of barometric readings made at these points amounts to 1,981, while
those made at the fixed stations, with which the former are to be
compared, amount to 1,671.

3. The division under the direction of J. Renwick has explored or
surveyed the line of highlands from the southeastern extremity of Lake
Matapediac to the vicinity of the river Du Loup, where the line of
survey has been connected with that of A. Talcott. In this survey a gap
is yet left of a few miles on the western side of the valley of the
Rimouski near its source.

In the course of the operations of this division 586 miles have been
passed over and such notes taken as will form the basis of a map. Of
these 586 miles, 275 have been actually measured, 209 are upon the
boundary claimed by the United States, and about 30 upon the line
pointed out by the proclamation of the King of Great Britain of the 7th
of October, 1763, as the southern boundary of the Province of Quebec,
making in all 239 miles of the height of land.

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