1899 WESTCHESTER COUNTY NEW YORK WALL MAP 1899 WESTCHESTER COUNTY NEW YORK WALL MAP his is a beautifully detailed, Colored lithographed map of Westchester County, New York. Shows streets, railroads and stations, trolley lines, churches, schools, school district boundaries, houses, light houses, marshes, landowners, etc. Depths shown by soundings, 1899. From Map: Map of Mount Vernon, East Chester, Pelham, New Rochelle, Scarsdale and Mamaroneck. (Published by Hyde & Company, 97 Liberty St., Brooklyn, N.Y.