 After the onset of illness, there were about 25 works in the 1936 catalogue, but his productivity increased in 1937 to 264 pictures, 1938 to 489, and 1939—his most productive year—to 1254.They dealt with ambivalent themes, expressing his personal fate, the political situation and his wit.Examples are the watercolor painting "Musiker" (musician), a stick-man face with partially serious, partially smiling mouth; and the "Revolution des Viadukts" (Revolution of the Viadukt), an anti-fascist art.