He was granted leave from April 1 till December 31, 1908, to work at the "Nietzsche-Archiv" in Weimar. In the summer, he travelled to Ernest Thiel in Stockholm as Elisabeth Förster-Nietzsche's emissary. Thiel, a banker and patron, had agreed to give a considerable amount of money for the founding of Förster-Nietzsche's "Stiftung Nietzsche-Archiv" ("Nietzsche-Archiv foundation"), despite his being partly of Jewish ancestry. (Förster-Nietzsche had married Bernhard Förster, an antisemitic agitator, but by this time had renounced antisemitism). At the end of 1908, Oehler became a member of the new Stiftung's Vorstand, or managerial board, on which he remained until 1945.