 Included in the papers is correspondence with Willi Baumeister, Theodor Heuss, Walter Gropius, Itten, Hermann Kasack, Alfred Kubin, Georg Muche and Max Stefl.In 1958, Adler, again writing as Roedl, re-issued his 1936 biography of Stifter and dedicated it to his wife, Ilse Katz.Roedl was also the author of the Adalbert Stifter, monograph, which Adler dedicated to Erich Heller.