<a href="https://en.wikipedia.org/wiki/Croton_Aqueduct" class="extiw" title="en:Croton Aqueduct">Croton Aqueduct</a> shutoff valve, illustration in <a href="https://en.wikipedia.org/wiki/Harper%27s_Weekly" class="extiw" title="en:Harper's Weekly">Harper's Weekly</a> magazine, November 12, 1881
W. St. John Hasker[?] (difficult to read artist's name (at bottom right — in caption)
Issue date: November 12, 1881; uploaded May 1, 2008
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