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United States. Department of the Interior, [YELL203479-D2059a-b] Letter from the Acting Secretary to John E. Wolff granting permission to capture photos of geysers and collect geological specimens for courses at Harvard University, dated June 9, 1908. (1908-06-09). Montana History Portal, accessed 08/05/2026, https://www.mtmemory.org/nodes/view/122090




![[YELL203479-D2059a-b] Letter from the Acting Secretary to John E. Wolff granting permission to capture photos of geysers and collect geological specimens for courses at Harvard University, dated June 9, 1908. [YELL203479-D2059a-b] Letter from the Acting Secretary to John E. Wolff granting permission to capture photos of geysers and collect geological specimens for courses at Harvard University, dated June 9, 1908.](/img/placeholder.gif?1778121553)

