Letter from Markus Brann to Dr. Thomson, March 24, 1910

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Letter from Markus Brann to Dr. Thomson, November 17, 1909

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Letters from Markus Brann to Dr. Freudenthal, March 24, 1910 and to Dr. Michael Guttmann, March 24, 1910

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Letter from Markus Brann to Dr. Behrens, March 3, 1910

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Letter from Markus Brann to Dr. S. A. Hirsch, March 1, 1910

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Letter from Markus Brann to Dr. Julius Theodor, January 3, 1910

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Letter from Markus Brann to Dr. Wiedemann, March 29, 1910

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Letter from Markus Brann to Dr. N. M. Nathan, October 6, 1910

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Typewritten Letter from Markus Brann to Dr. Niemcowicz, November 24, 1910

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Letter from Markus Brann to Isidore Goldblum, March 24, 1910

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