A "Symphonisches Präludium" (Symphonic Prelude) in C minor was discovered by Mahler scholar Paul Banks in the Austrian National Library in 1974 in a piano duet transcription. Banks ascribed it to Gustav Mahler, and had it orchestrated by Albrecht Gürsching. In 1985 Wolfgang Hiltl, who had retrieved the original score by Rudolf Krzyzanowski, had it published by Doblinger (issued in 2002). According to scholar Benjamin-Gunnar Cohrs, the stylistic examination of this "prelude" shows that it is all Bruckner's. Possibly Bruckner had given a draft-score to his pupil Krzyzanowski, which already contained the string parts and some important lines for woodwind and brass, as an exercise in instrumentation.