The undersigned can not refrain from stating that the necessity of applying for further funds was unexpected by each of them individually, as it is painful to them collectively.  There are, however, reasons that in their opinion are incontrovertible which have led to an expenditure thus exceeding their estimate submitted to the Secretary of State the 11th of January, 1841: 

1.  The estimate for the expenses of the division under the direction of Major Graham amounted to $22,500.  This referred only, however, to the continuation of the survey of the meridian line; and as the country had been represented by the most authentic maps as generally rising from the monument to the north, it was inferred that the timber to be cut away in opening this line through a dense forest would be of the description generally found upon elevated and dry lands, and the labor supposed to be requisite was estimated accordingly.  So far, however, from this being the case, 26 miles out of the 32 between the base of Parks Ridge, near Houlton, and the river Des Chutes (6 miles north of the latitude of Mars Hill) have actually been found to be below the level of the monument and intersected by swamps covered with a thick growth of cedar and other timber common to such land, extremely difficult to cut away.  More than double the labor estimated had therefore to be performed in accomplishing this and all similar portions of the work, and a corresponding increase of expense was unavoidable.

In addition to this increased labor upon the meridian line, the division of Major Graham has executed the surveys between that line and the head waters of the Aroostook, already given in detail, the expenses for which were not estimated or included in the sum above mentioned.

The cost of this survey, including the instruments that were required for it, has amounted to $5,500, and while this sum should be added to the original estimate for this division, the expenses of the divisions of the other two commissioners have not in any manner been thereby diminished, for the actual quantity of work performed by them has exceeded what was supposed from the best maps extant to be necessary upon the whole of the lines claimed by the two Governments, respectively, exclusive of the meridian line, as will hereafter be shown.

There was another cause which tended in a great degree to augment the expenses of this division in proportion to the progress of the work, which it was not within the power of human agency to control, and which we should not omit to mention here.

The severe drought which prevailed throughout this region of country during the month of August and the greater part of September caused the fires which are annually set to the fallen timber upon newly cleared lands to spread far and wide into the growing forest, and so rapid was its progress and so serious its ravages as to compel the inhabitants in many cases to fly for the preservation of life.  Some check was experienced in the duties along the meridian line from the flames that actually embraced it, but a far more serious one from the dense smoke which filled the atmosphere almost incessantly for six weeks, and so obstructed the view as to render it impossible to fix the stations in advance with the requisite precision.