Brief an College [Karl Lamprecht]
o.O., o.D. [1914]Brief an College [Karl Lamprecht]
Leipzig, 18 Jan 1915Brief an College [Karl Lamprecht]
Leipzig, 4.VI.1910Brief an College [Karl Lamprecht]
o.O., 7.6.1914Brief an College [Karl Lamprecht]
Leipzig, 14.11.[19]14Brief an College [Karl Lamprecht]
o.O., 24.I.[19]15Brief an Kollege [Joseph Partsch]
Leipzig, 10. November 1910Brief an Kollege [Joseph Partsch]
Leipzig, Schillerstr. 7, 5. Jun[i] 1912Brief an Kollege [Joseph Partsch]
Leipzig, Schillerstr. 7, 21. Okt. 1913Brief an Kollege [Joseph Partsch]
Leipzig, Schillerstr. 7, 24. April 1913