1817 - 1887 (70 years)(
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Johann Friedrich Voss b. 27 Dec 1808 d. 4 Oct 1860 b. 5 Nov 1846 d. 28 Jun 1918
Friedrich Johann Wilhelm Zimmermann b. 22 Jun 1843 d. 11 Sep 1902 b. 17 Oct 1880
Robert Henry Christian b. 17 Aug 1878 d. 2 Jun 1939 b. 22 Jul 1906 d. 9 Oct 1984
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