Stumbled across the art writer Frank Rutter's rare little work Revolution in Art (Art News Press, London 1910) and noticed it was presented to E. McKnight Kauffer the poster artist (pic above). An interesting association as Rutter was a great supporter of the poster. He wrote:
The whole nation is much less affected by what pictures are shown in the Royal Academy than by what posters are put up on the hoardings. A few thousand see the first, but the second are seen by millions. The art galleries of the People are not in Bond Street but are to be found in every railway station.
Wikipedia in its lengthy bio of Frank Rutter has this poster by the Brothers Warbis from 1915 "Why bother about the Germans invading the country? Invade it yourself by Underground and Motor-Bus."
Rutter was a great supporter of the new art from Cezanne, Van Gogh, Picasso etc., and his 1910 work has this fervent dedication:
To Rebels of either sex all the world over who in any way are fighting for freedom of any kind I dedicate this study of their painter-comrades.
The title is a reference to Gauguin's statement "In art there are only revolutionists or plagiarists.'