In addition to being a musician and the editor of Nietzsche's writings and letters, he worked as a writer under various pseudonyms, including: Ludwig Mürner, Peter Schlemihl, Petrus Eremitus.
The text describes someone who is a musician, an editor of Nietzsche's works, and also uses several pen names, including Ludwig Mürner, Peter Schlemihl, and Petrus Eremitus.