| Underwood & Underwood Aqueduct of Claudius (42 miles long, constructed A.D.52) 1897 Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s28518 (digital file from original) LL/109485 Underwood & Underwood, copyright.
J.F. Jarvis, publisher.
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