In 1922, at the request of Jewish leadership, Nadel worked for years on an anthology of synagogue music, Kompendium Hallelujah! Gesänge für den jüdischen Gottesdienst, which he finished in 1938 and intended to publish in seven volumes [REF].
Before he was deported, Nadel was able to leave his large collection of old Jewish liturgical materials with a non-Jewish neighbor,[REF] some of which survived and were purchased by his friend Eric Mandell.