His dark comedy "Der Oytser" ("The Treasure"), written in Yiddish 1902-1906 but first staged in German, by Max Reinhardt in Berlin in 1910, tells of a sequence of events in which the people of a town dig up and desecrate their own graveyard because they have come to believe there is a treasure buried somewhere in it. Rich and poor, secular and religious, all participate in the frenzy; a supernatural climax involves the souls of the dead, annoyed by the disruption.