1.
Nikolaus Trübner an Hugo Schuchardt (2-11885)
2.
Hugo Schuchardt an Matthias de Vries (01-1)
Hugo Schuchardt an Matthias de Vries (02-2)
Hugo Schuchardt an Matthias de Vries (04-3)
Hugo Schuchardt an Matthias de Vries (06-8)
Hugo Schuchardt an Matthias de Vries (10-4)
Rodolfo Lenz an Hugo Schuchardt (04-06398)
Richard Riegler an Hugo Schuchardt (11-09598)