| Unidentified photographer View of the Quartz Rock at the British Guiana Gold Company's Diggings on the Rio Cuyuni 1856-1866 (ca) Albumen print Rijksmuseum RP-F-2001-7-404-7 LL/78890 George W. Bennett, 1866, An illustrated history of British Guiana compiled from various authorities, (Georgetown, Demarara: Richardson & Co.)
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