topic

• Real property13
• Water-supply7
• Administrative and political divisions6
• Railroads6
• Streets6
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name

• Welcke, Robert A33
• New York (N.Y.). Aqueduct Commission6
• Risse, Louis A5
• Welcke, Robert A3
• Church, B. S. (Benjamin Silliman), 1836-2
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collection

• Maps of New York City and State35
• Maps of North America4

place

• New York (State)31
• New York22
• Croton Aqueduct (N.Y.)9
• Bronx (New York, N.Y.)7
• New York (N.Y.)7
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genre

• Maps39
• Cadastral maps7
• Topographic maps6
• Aerial views1
• Road maps1

publisher

• Aqueduct Commission4
• Robert A. Welcke Photo-Lith4
• Photo-lith. by Robert A. Welcke3
• publisher not identified3
• Aqueduct Commission?2
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division

type

• cartographic39
• still image1