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Photograph, monochrome. 'Canal Channel…' Science Museum Group © The Board of Trustees of the Science Museum
photograph. monochrome. 'Canal Channel Science Museum Group Collection © The Board of Trustees of the Science Museum, London
photograph. monochrome. 'Canal Channel. Looking South, from East Mamei to Gamboa. Width of Channel 500 feet; surface of water 55 ft. above sea level.' / [Panama Canal construction, October 1912]. 20 x 25 cm.