In October 1836 he got a job at the University of ZÃ 1\/4 rich as a lecturer in anatomy and went back to ZÃ 1\/4 rich where he spent his final months writing and teaching until he died of typhus at the age of twenty-three . In October 1836 , after receiving his doctorate and being appointed by the University of Zurich as a lecturer in anatomy , BÃ 1\/4 chner relocated to Zurich where he spent his final months writing and teaching until he died of typhus at the age of twenty-three .