May 2018 Project Martha – Historical & Archaeological Background 32 Figure 19. Photograph, dated 18 August 1904, showing the Waihi Gold and Silver Mining Company’s Battery and Cyanide Plant (source: Sir George Grey Special Collections, Auckland Libraries, AWNS19040818-7-1) Figure 20. Photograph, dated 13 July 1905, showing the Silverton/Union Battery, operated by the Waihi Gold and Silver Mining Company (source: Sir George Grey Special Collections, Auckland Libraries, AWNS-19050713-4-2)
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