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An envelope used for a letter from Edmond Perrier, director of the Muséum d'Histoire Naturelle, showing Robert Hottot's addresses in Paris and Rueil.
Pitt Rivers Museum, Manuscript Collections, Hottot Papers 3/69
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Source: Philip N. Grover and Christopher Morton, Congo Journey: Photographs and Documents from Robert Hottot's Expedition to Central Africa, 1908-9 [website], (published online September 2005, last updated 8 February 2006) <http://www.prm.ox.ac.uk/congojourney>.
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