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Winter-Quartett (Winter Quartet)
Dionysisches Quartett (Dionysiac Quartet)
Songs of Narcissus
Text by unknown author(s)
Venus Songs
Implied but not listed in the Olga Diener estate papers [2013-11-23].
Existence unverified.
Incomplete; movement 6 breaks off at m. 24 [2020-04-11].