1900 Map of Oyster Bay

Inland, the topography rises toward Harbor Hill, revealing a countryside still dominated by large estates and agricultural clusters around Wheatley and Brookville. Across the water, the Westchester shoreline includes the developing commuter enclaves of Mamaroneck and Larchmont. The survey captures the region just as the expansion of the Port Jefferson Branch was solidifying the residential character of towns like Syosset and Oyster Bay.