"As nearly all vertical wall is constructed in the winter or early spring, and when the banks are frozen, the cut is usually vertical or nearly so, and any charge for such excavation is a fraud upon the State. The contracts also uniformly provide that the contractor shall be allowed nothing for the filling in of the place supposed to be excavated behind the walls, if such filling is from earth already paid for as excavation, unless he is obliged to draw his material more than 200 feet on the line of the canal. This provision has also come to be treated as obsolete, and the State seems to have been uniformly charged not only for excavation which had not been made, but for filling up the assumed excavation which, had it been made, the State was not bound to pay for. The profits derived in this indirect way through the fraudulent connivance of the agents of the State, has led to an enormous expenditure for works wholly unnecessary, and which to keep in repair must continue to subject the State to a very considerable yearly expense. "One of the principal expenditures upon the canals since 1868 for extraordinary repairs has been made in the construction of vertical and slope walls which have been, as we think, very unwisely substituted for the old walls, the capacity of the canals before their removal having been ample for all their business. "Between the 1st of January, 1868, and the 1st of July, 1875, there have been built forty-three and one-third miles, linear measure, of vertical wall, at a total cost, including the removal of bench walls which they displaced, of $1,589,885, the cost per linear foot averaging $6.95. "These walls, besides costing four or five times as much as the slope walls, are less durable, much more expensive to keep in repair, and possess no substantial advantage except in large towns, the commerce of which requires special facilities for docking. But of the forty-three and one-third miles built since 1868, it cannot be pretended that so many as three were needed to meet such exigencies. "Without stopping at present to inquire if the business of the canal justified the removal of the old bench walls at all, it is very certain that a good slope wall would have been preferable throughout nine-tenths, at least, of the entire extent upon which vertical wall has been constructed; and, at the rate paid for slope wall during this period, would have resulted in an economy to the State of not less than $1,300,000, or nearly $200,000 a year. "An important item in the cost of this vertical wall was made up of the fictitious estimates to which we have already alluded. Assuming that the State was uniformly charged with fictitious excavation and embankment along the entire length of this vertical wall--and we have no satisfactory proof that a single rod of it was entitled to be excepted--the loss to the State from this source alone cannot be estimated at less than $230,000.