Helbig an Dressel, Gatti, Körte, Lepsius, Mau, Ritschl, Ronconi, Studniczka 1873-1899. - Helbig, Wolfgang, 1839-1915
Irregularly numbered.
Includes lists of names.
Includes a summary of of the letters sent by Wolfgang and Nadine Helbig to Franz Studniczka.