Oil/canvas, 71 x 57 cm, lo. ri. sign. Hr. Heidner. - German landscape a. figure painter, studied at the Munich academy as masters student of W. v. Diez, since 1904 he exhibited at the Munich Glaspalast a. with the Munich secession as well as in Berlin, Dresden a. Düsseldorf. Under the impression of World War I he changed from impressionism to expressionism. - Mus.: München (Neue Pinakothek), Nürnberg, Magdeburg. - Lit.: Thieme-Becker, Vollmer.