Brief an Professor [Rudolf Lipschitz]
Bad Liebenstein, 14.10.1881 [14.X. [18]81]Brief an Professor [Rudolf Lipschitz]
Bad Liebenstein, 26.10.1881 [26 Oktober 1881]Brief an Professor [Rudolf Lipschitz]
Straßburg, 22.02.1882 [22./II 1882]Brief an Professor [Rudolf Lipschitz]
Berlin, 06.01.1884 [den 6ten Januar 1884]Brief an Professor [Rudolf Lipschitz]
Kassel, 10.04.1892 [10.4.1892]Brief an Professor [Rudolf Lipschitz]
Kassel, 05.11.1892 [5.11.1892][Visitenkarte]
[o.O.], 1881-1892 [o.D. [vermutlich zwischen 1881 und 1892]]