The arches in the channel were to be eighty feet span, and one hundred feet in height above high water-mark to the under side of the arches at the crown, or they might carry the water across by a tunnel under the channel of the river, the top of the tunnel not to be higher than the present bed of the channel.'

Later on, by act of April 16, 1858, the Legislature directed the mayor and aldermen of New York and the supervisors of WestchesterCounty to erect and maintiiin a public free bridge across Harlem River from a point in the city near the terminus of Eighth Avenue to a point in Westchester County at or near the terminus of the Macomb's Dam road. This was the authority for building the present Central Bridge. Lewis G.Morris and Charles Bathgate were appointed commissioners for the county. The commissioners were directed to remove the old Macomb's dam and the obstructions in the river caused by it and to see that the river was made navigable according to its natural capacity. The expense was limited to ten thousand dollars for each county, and of the share of Westchester County, one-third was taxed upon West Farms and Morrisania and the residue upon the rest of the county. The cost proving much heavier than was anticipated, each county was authorized in 1859 to double its original appropriation, and in 1860 Westchester was

- Renwick rs. Morris, 7 Hill, 575.

3 rii.ipter rc<-\viii. Laws l.'i.'in, page 293.