While the party charged with the astronomical operations was thus deprived of the opportunity of making scarcely any progress for six weeks, the expense of maintaining it could not in any way be diminished, because there was a daily hope that such a change in the weather might occur as would have removed this difficulty. In order to make amends as far as practicable for so much time unavoidably lost, this division continued to prosecute its field duties north of the forty-seventh degree of latitude until several weeks after the severities of winter had commenced, with no other protection than their tents, the commissioner in charge of it believing that the expectations of the Government and of the country generally would but be fulfilled by the investigations in relation to this important line being pushed to the utmost attainable point. But for this it would have been impossible to have reached the St. John River the late season. There remains to be surveyed along this meridian line, in order to reach the northwest angle of Nova Scotia as claimed by the United States, about 64 miles, to accomplish which will require another season of active field duty. 2. In the estimate for the work of the divisions of A. Talcott and J. Renwick it was assumed that the length of the boundary remaining on the line claimed by the United States was 320 miles, and upon the lines claimed by Great Britain 170 miles. Of the latter, about one-half was undertaken by Major Graham'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.