Fünf gelbe Akte am Wasser. 1921.
Lithograph in colors.
Karsch 156 a (of c). Signed. One of 25 prints on this type of paper. On Japon. 33.5 x 44 cm (13.1 x 17.3 in). Sheet: 37 x 50,5 cm ( 14,5 x 19,8 in).
Published by Hyperion Verlag.

Mueller observed scenes of bathers like this one on his visits to the islands of Föhr and Sylt, as well as on the Flensburg Firth..Mueller's sheet, [.], is of the same quality as the works by his colleagues, the difference, however, lies in his more aggressive display of eroticism."
Heinz Spielmann, in: Die Maler der "Brücke". Collection Hermann Gerlinger, Schleswig-Holsteinisches Landesmuseum, Stuttgart 1995, p. 413