At Anchor: A Narrative of Experiences Afloat and Ashore during the Voyage of H.M.S. Challenger from 1872 to 1876.

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This is a straightforward and rather innocuous account of the three and a half year voyage, emphasizing flora and fauna as well as buildings throughout their shore visits. Pleasant but anodyne. Wild was the official photographer of the expedition. Wikipedia states in the Wild entry: The ship was equipped with a dark room, enabling development of the photographs taken of the lands and peoples encountered. It is thought that this expedition was the first to include routine photography as well as an official artist .