Should the Board be of opinion, that either the tunnel plan, or the wooden arch bridge, would be the most suitable for them to adopt, I shall feel no hesitation in going forward, with every effort in mypower, to produce a successful accomplishment. It is, however, opinion, as before expressed, that under all the circumstances, the aqueduct my bridge of masonry with iron pipes for the conduit, is the most suitable structure to be adopted and should the Board coincide with this opinion, I have no doubt, that when ;

completed, it will be viewed as the most satisfactory work. Respectfully submitted. JOHN B. JERVIS, Chief Engineer, N. Y. W. W.

172 MEMOIR OF THE The Commissioners, for all sufficient reasons, preferred the high bridge to the tunnel, and without having in any degree changed their own views, as to the superiority of the syphon bridge to either, they issued a notice on 15th June for building a bridge of masonry, in conformity with the specifications exhibited. Meantime the general work on the line went forward " with full as much speed," " as is desirable under " say the Commissioners, present circumstances ;" they add, had the Commissioners, however, been pursue the original plan of the work, there can left to

scarcely be a doubt that the Croton water would have been flowing through our streets, and regaling both the taste and sight of our citizens, on, if not before, the 4th July, 1842."

The summary of the work for the first six months of 1839, is thus given :