Brief an Professor [Karl Lamprecht]
Freiburg i[m] B[reisgau], Friedrichstr. 37, 18 VII 1894Brief an Professor [Karl Lamprecht]
Freiburg i[m] B[reisgau], 13.I.1895Brief an Professor [Karl Lamprecht]
Freiburg i[m] B[reisgau], 14.II.1895Brief an Professor [Karl Lamprecht]
Rom, 5 Via del Campidoglio III (Casa Rossetti), 27 II [18]96Brief an Professor [Karl Lamprecht]
Freiburg i[m] B[reisgau], 18.III.1899Brief an Professor [Karl Lamprecht]
Freiburg [im Breisgau], 21.VIII.[18]99Brief an Dr. [Carl] Sutter in Freiburg i[m] B[reisgau]
o.O., 17 Juli [189]4