The Commissioners who were appointed in 1833, and re-appointed in 1834, continued in the performance of their duties until 1837--in March, of which year Thomas T. Woodruff was appointed in the place of Benjamin M. Brown, who resigned his office, and the Board of Commissioners thus constituted, continued until March, 1840, when they were succeeded by Samuel Stevens, John D. Ward, Zebedee Ring, Benjamin Birdsall and Samuel R. Childs. This Board of Commissioners remained in office until February, 1843, when they were succeeded by the gentlemen who composed the former Board. OF PLANS PROPOSED FOR FURNISHING THE CITY WITH WATER, AND OF THE PLAN ADOPTED. In the course of examinations which were made to determine sources whence water could be obtained, questions of deep importance presented themselves in regard to the source to be relied upon for a supply, also in reference to the plan which should be adopted for conducting the water to the city. It was of so much importance to the city that the supply should be such as not only to answer the present purposes, but be adequate to the future increased demands, and that the quality of the water should be unquestionable, that it became necessary to extend the examinations over every watered district in the vicinity, in order to judge of the comparative merits of different sources. The Engineers who were employed, traversed the country, gauged the streams, reported their supply, the quality of the water, and plans which might be adopted for conveying it to the city. It was a field for the exercise of the talent and research of the Engineer: in resorting to a distant stream for a supply, any plan which he might propose for conveying the water, would encounter obstacles requiring skill and ingenuity to overcome. He would find it necessary to build up the valleys, pierce through the hills, and span the waters of the arms of the sea which embrace the city and make it an island. Structures would be required, which, in their design, would find no parallel among the public works of this country, and in forming plans for them he might study with advantage, the works constructed for similar purposes by the Ancient Romans. The examinations embraced all the sources from which a supply of water might be obtained in the neighboring counties of Westchester and Putnam; giving a comparison of the different streams in regard to their elevation, their capacity, and the quality of the water. It was decided that the Croton River would supply a sufficient quantity of water at all seasons of the year; at an elevation precluding the use of steam or any other extraneous power, and that the quality of the water was unexceptionable. Other streams were found which would furnish water equally pure, but too limited in quantity at certain seasons of the year, and not at a sufficient elevation.