When he returned to London in August 1917, Nevinson first completed six lithographs on the subject of "Building Aircraft" for the War Propaganda Bureau portfolio of pictures, "Britain's Efforts and Ideals", and then spent seven months in his Hampstead studio working up his sketches from the Front into finished pieces. A number of officials from the Department of Information visited the studio and soon began complaining about these new works. Nevinson was now focused on individuals, either as people displaying heroic qualities or as victims of warfare. He did this by painting in a realistic manner using a limited colour palette, sometimes only mud-brown or khaki. Whereas for his 1916 exhibition Nevinson had displayed both realistic works and pieces using Cubist and Futurist techniques, for his 1918 exhibition all the works were realistic in style and composition.