Robert Elias Fries (1876 - 1966). This picture has previously been published in Mycological Notes, by C. G. Lloyd, No 32, Februari 1909, s.419. There is no information who took the picture, it just says "Our photographs of Theodor M. Fries, Oscar Robert Fries, and Robert E. Fries need no explanation.".
Curtis Gates Lloyd  (1898 - 1925) (probably not photographer, he is the author of Mycological notes)
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