Oil/cardboard, 24 x 30 cm, lo. le. sign. K. Heffner, on the reverse on label of the artist titled 'An der Elbe bei Hamburg'. - German landscape painter, influcend by Turner, Constable a. Corot. H. was pupil of J. N. Otto a. A. Stademann. He lived a. worked in Rome, Florence, Vienna, Dresden, Freiburg a. Berlin. - Mus.: Munich (Neue Pinakothek), Bristol, Milwaukee, Melbourne a. others. - Lit.: Boetticher, Thieme-Becker, Bénézit a. others.