Rhodes addressed a letter to the Chairman of the Commissioners, in which he says, " The natural abutments and high hills

MEMOIR OF THE near the Quaker Bridge, will give an elevation of 200 feet above the tide, if required. The canal to Sleepy Hollow will be on a level with the dam, which gives us the same head at Sleepy Hollow as we have at the dam. By my plan we arrive at Sleepy Hollow, travelling only eight miles with the whole of the Croton."

On the 18th of April, 1834, Mr. Rhodes addressed a communication to the Com- " Fire and mittee of the Common Council, on Water," in which he proposes to build a dam at a point about four miles above the Quaker Bridge, of 32 feet high. From this he is to take the water in a canal 10 feet at bottom, 34 feet at top, and 8 feet in depth, on the same line nearly as that proposed for the Hudson river route, in our report of November, 1833, to a reservoir near Harlem river, and from said reservoir to cross Harlem river by iron to the receiving and distributing reservoir on the island of New York pipes, ; the in cash, when Corporation to pay all damages for water and land rights, and $1,700,000 the work is finished according to contract but to allow him interest as the work pro- ;

gresses. (See Document, No. 109.) It will not be expected, as we presume, either by Mr. Rhodes or by the Common Council, that the Commissioners should place much reliance upon the plans and propositions of a gentleman, .who appears to have given the subject but a very superficial consideration at most. How he is to convey either six or sixteen millions of gallons of water from the mouth of the Croton, in accordance with his first proposition, and at an elevation of 125 feet above low water, at the city of New York, it would puzzle the most expert proficient in hydraulics to tell.