's
division,[19] leaving for the estimated distance to be surveyed by the
divisions of A. Talcott and J. Renwick 450 miles.

[Footnote 19: It has already been stated that in the survey of the
portion of this line allotted to Major Graham there were actually
measured upon it, with the chain, 276 miles, and this did not constitute
more than one-half the labor and expense incident to all the duties
enumerated and performed by his division on his portion, so much did the
work required upon this portion of it exceed what was estimated for the
whole of it.]

It will appear by the statement hereinbefore given that the joint
surveys of these two divisions upon the lines of highlands have actually
amounted to 574 miles. Upon the principle of their estimate, the
probable cost of this would have amounted to $49,746.37, and with the
addition for instruments and for the additional cost of the more remote
parts of the line to $57,079.70.

The actual cost, including the foregoing estimate for the completion of
the work, is $54,000.

It will appear, therefore, that when the increased extent of the work
performed over that made the basis of the estimate is considered, the
cost of performing it, so far from having exceeded the estimate, has
fallen short of it by $3,000.

The reason of the discrepancy between the real extent of the line, as
actually measured, and that which formed the basis of the calculation is
that the latter was made by reference to the best existing maps, which
were considered to be entitled to a certain degree of credit. Upon the
close examination which the operations of the late season have afforded,
these maps have been ascertained to be exceedingly erroneous. Well-known
streams have been found to extend in either direction many miles beyond
the points at which their sources have been laid down on the maps, and
great rivers and lakes have, as it were, been discovered, of which no
delineation had ever been given by geographers. The extent of these
errors in remote and difficultly accessible points may be inferred from
what has been found to occur in the part of the region which is most
accessible, best known, and most frequently traversed.

On the Temiscouata portage, a road traveled weekly by the mail of Her
Britannic Majesty, continually passed by the officers of her various
services, which had been carefully surveyed by civil engineers
preparatory to its reconstruction, and which has been traveled by the