Brief an Herr [Karl Lamprecht]
Bremen, Park-Allee 37, 13.3.[19]08Brief an Professor [Karl Lamprecht]
Viersen, 19. Mai 1885Brief an Professor [Karl Lamprecht]
Wien, 10/I 1897Brief an Professor [Karl Lamprecht]
Liegnitz, Ritterakademie, 11.I.[18]97Brief an Professor Lamprecht
New Haven, Conn., 19 November, 1906Brief an Professor Lamprecht
New Haven, o.D. [Dezember 1904]Brief an Professor Lamprecht
New Haven, 7 January, 1908Brief an Professor Lamprecht
New Haven, March 28, 1908Brief an Professor Lamprecht
o.O. [New Haven], April 16, 1908Brief an Prof. Dr. Lamprecht in Leipzig
Bremerhaven, Lehe, Hafenstr. 137, 2. D[e]z. 1914Postkarte an Professor Dr. Lamprecht in Leipzig, Thomasiusstr. 2
Greifswald, 5.I.1897