Henry-Louis de la Grange's fascinating biography tells the story of Mahler along with 2 room-mates being kicked out of their rented attics in Vienna for singing too loudly the act 1 of Walküre. The 2 others were Hugo Wolf and Hans Rott.
Rott died early. His mental health it seemed was poor and he suffered from paranoia believing that Brahms wanted to kill him.His musical legacy is small (see details at the site of the Rott society here) His symphony has recently ben played in concert by Järvi father and son (Paavo since they are several active) and radio broadcast could be found on some yahoo groups.
This is an absolute masterpiece wich Mahler called the founder of the new Symphony.
Do try to hear it (and if you want access to these yahoo postings, let me know). I need in the future to resume back tho this work but let me say that the orchestration reflects the influence of Bruckner although I wish that Bruckner had gone the Rott way and that from a spirit point of view, this seems like going towards Mahler First Symphony. A revelation.
This is a work of the highest order. His Symphony should be mandatory to all major orchestras worldwide.