Brief an Freund [Rudolf Lipschitz]
[o.O.], 20.04.1864 [d. 20ten April 1864]Brief an Freund [Rudolf Lipschitz]
[o.O.], 07.02.1869 [7/2 1869]Brief an Freund [Rudolf Lipschitz]
[o.O.], 29.01.1869 [29/1 [18]69]Brief an Freund [Rudolf Lipschitz]
[o.O.], 1864 [o.D. [Frühjahr 1864]]Brief an Freund [Rudolf Lipschitz]
[o.O.], 06.05.1864 [Freitag d. 6. Mai 1864]Brief an Freund [Rudolf Lipschitz]
[o.O.], 07.11.1866 [7/11 1866]Brief an Freund [Rudolf Lipschitz]
[o.O.], 24.03.1868 [24/3 1868]