On the 27th of December, 1837, after he had placed thirteen sections of the first division under contract, and therefore with some practical experience of the value of such

work, Mr. Jervis made an estimate of the cost, so far as the engineering was concerned, of the whole line, which amounted to $7,877,346 00 This was exclusive of the cost of land, salaries, and other expenses, which the Commissioners themselves estimated at 586,567 00

$8,464,033 00

For the additional cost of the high bridge, 443,432 00

$8,907,465 00

Nine millions therefore, may be assumed as the cost of the aqueduct, over and above the loss of interest on the capital, until the work be finished and productive.

CROTON AQUEDUCT. 177

This report closes with a general recapitulation of the work done, of the difficulties overcome, and of the nature, form, and materials of the aqueduct, all which we propose to present in a connected form, after the narrative of the progress of the work is completed.

On the 30th March, 1840, the Commissioners, who, from the commencement of this great enterprise,had directed and superintended its progress, having been superseded, made a final report to the Board of Aldermen. This sets forth the precise condition of the funds which they had received, of which the details, with accompanying vouchers, were communicated to the Comptroller, and the balance in hand paid over to their successors it gives information of the exact condition of the work, and of what had been done ;