Brief an Freund [Rudolf Lipschitz]
Berlin, 20.04.1872 [20. April 1872]Brief an Freund [Rudolf Lipschitz]
Rüdersdorf, 10.06.1872 [10/6 1872]Brief an Freund [Rudolf Lipschitz]
Rüdersdorf, 26.07.1873 [26 Juli 1873]Brief an Freund [Rudolf Lipschitz]
Berlin, 17.12.1875 [17 Dec. 1875]Brief an Freund [Rudolf Lipschitz]
Berlin, 20.12.1875 [20 Dec. 1875]Brief an Freund [Rudolf Lipschitz]
Berlin, 21.12.1875 [21/12 [18]75]Brief an Freund [Rudolf Lipschitz]
Berlin, 25.12.1875 [25 Dec. 1875]Brief an Freund [Rudolf Lipschitz]
Berlin, 29.12.1875 [29 Dec. 1875]Brief an Freund [Rudolf Lipschitz]
Berlin, 04.01.1876 [4. Januar 1876]Brief an Freund [Rudolf Lipschitz]
Berlin, 11.02.1876 [11 Febr. 1876]Brief an Freund [Rudolf Lipschitz]
Berlin, 16.02.1876 [16 Febr. 1876]Brief an Freund [Rudolf Lipschitz]
Berlin, 13.04.1876 [13/4 [18]76]Brief an Freund [Rudolf Lipschitz]
Berlin, 17.11.1876 [17/11 [18]76]Brief an Freund [Rudolf Lipschitz]
Thun, 12.08.1877 [12 August 1877]Brief an Professor R. Lipschitz
Bern, 19.08.1862 [19. August 1862]Brief an Professor R. Lipschitz
Bern, 01.09.1862 [1. September 1862]