Herr Slossen Boschen

Herr Slossen Boschen is a German professor who appears in Jerome K. Jerome's Three Men in a Boat (To Say Nothing of the Dog) (1889). The three protagonists, J., George, and Harris, encounter Herr Slossen Boschen when he's prompted to sing a comic song. After he's finished singing in German, J. suggests Herr Slossen Boschen translate the song into English so its audience would get the full effect. Herr Slossen Boschen angrily explains that the song is not a comic one, but rather, a tragedy.

Herr Slossen Boschen in Three Men and...Stories
Because J. mistook Professor Abraham van Helsing for Herr Slossen Boschen, and because J. felt he needed to make amends to the German, he and his friends helped van Helsing hunt a vampire in the early hours one Saturday morning.