Brief an Althoff
Bonn, 29. Juni [18]89Brief an G[eheim]R[at Althoff]
o.O., [1885]Brief an G[eheim]R[at] Althoff
Bonn, 20. Jan. [18]89Brief an G[eheim]R[at] Althoff /
[Rückseite] : Brief an [Karl Lamprecht]o.O. [Berlin], o.D. [1889]Brief an Geh[eim]R[at Althoff]
o.O., [1886]Brief an Geh[eim]R[at Althoff]
Bonn, 3 Jan 1889Brief an Geh[eim]R[at Althoff]
Bonn, 21 Sept. [1889]Brief an Geh[eim]R[at Althoff]
Bonn, 22 Sept. 1889Brief an Geh[eim]R[at] Althoff
o.O., 8 D[e]z [18]88Brief an Gehe[im]rat [Althoff]
o.O., [1884]Brief an Geheimrat [Althoff]
Bonn, 20. Juni [18]89Brief an Geheimrat [Althoff]
Bonn, 1. Juni 1889Brief an Geheimrat [Althoff]
o.O., 12. Juni [1884]Brief an Geheimrat [Althoff]
30 No[vem]b[e]r 1893Brief an Professor [Karl Lamprecht]
Berlin, 4. Januar 1889Brief an Professor [Karl Lamprecht]
Berlin, 17. März 1889Brief an Professor [Karl Lamprecht]
Berlin, 17. Aug. 1885Brief an Professor [Karl Lamprecht]
Berlin, 20. September 1889Brief an Professor [Karl Lamprecht]
Berlin, 6. Juli 1893Brief an Professor [Karl Lamprecht]
Berlin, Behrenstr. 69, 11. Dez. 1901