IRT Subway: Interborough Rapid Transit Company Subway and Elevated Lines (Official Guide of the Railways, 1906), Manhattan North & Bronx.

IRT Subway: Interborough Rapid Transit Company Subway and Elevated Lines (Official Guide of the Railways, 1906), Manhattan South.

Interborough Subway Map and timetable from the Official Guide of the Railways, Nov.

IRT Subway: Profile Map of the New York Subway from Brooklyn Bridge to the Bronx (The Subway Deal, 1904).

IRT Subway: Interborough Rapid Transit Company Map, Showing Present Subway and Elevated Lines and Proposed Extensions (1904).

IRT Subway: Underground Rapid Transit Routes Proposed by the Metropolitan Interests (1904) (PDF).

IRT Subway: Map and Profile of Brooklyn-Manhattan Rapid Transit Subway (Contract 2) (1904).

IRT Subway: Plan and Profile of the Rapid Transit Subway (Century Magazine, 1904).

IRT Subway: Interborough Rapid Transit Subway and Elevated Lines ( The New York Subway, Its Construction and Equipment, 1904).

IRT Subway: Map and Profile of the IRT Subway (1904).IRT Subway: Map and Profile of the IRT Subway (New York Subway Souvenir, 1904).

Several different maps were published coinciding with the opening of the IRT subway in 1904 and its Brooklyn extension in 1905.Brooklyn Survey Map - Trolley Lines (1888), Rockaway and Jamaica Bay Area Detail, New York and Rockaway Beach Railroad.Brooklyn Survey Map - Trolley Lines (1888), Prospect Park to Canarsie Detail, showing Bay Ridge branch LIRR.

Brooklyn Survey Map - Trolley Lines (1888), Jamaica Area Detail.Brooklyn Survey Map - Trolley Lines (1888), Coney Island Area Detail.Brooklyn Survey Map - Trolley Lines (1888).Polyconic projection, North American datum. Surveyed in 1888- in cooperation with the State of New York.' / 'Edition of Feb.1900, reprinted 1948. Coast and Geodetic Survey, N.Y.City Government, S.H.Bodfish, Frank Sutton, and J.W.Thom. 'State of New York - Represented by the Department of Public Works'. The map is labeled as follows: 'United States Department of the Interior Geological Survey'. Railways and trolley rights-of-way are noted. Our first map is a scan of a USGS survey map of southern Brooklyn, originally drafted in 1888.

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