Das Liederspiel. Par HUMPERDINCK ENGELBERT. When Engelbert Humperdinck’s fairy tale opera Hänsel und Gretel was premiered on 23 December 1893 in Weimar conducted by Richard Strauss, the work could look back on an extensive history of origin. Humperdinck’s younger sister Adelheid Wette (born in 1858) had displayed a great interest in literature in her youth and written a variety of poems for specia…