1. John Jensen, 'The end of the line? The future of British cartooning', in A Sense of Permanence? Essays in the Art of the Cartoon (CSCC: Canterbury, 1997), pp. 11–18.
2. David Kunzle, The History of the Comic Strip: the Nineteenth Century (University of California Press: Berkeley, 1990), p. 377. See also Wolfgang Schivelbusch, The Railway Journey: the Industrialization and Perception of Time and Space (Berg, 1986).
3. Many of these cartoonists have deposited artworks in archive of the Centre for the Study of Cartoons and Caricature at the University of Kent at Canterbury - an invaluable resource.
4. 'Obstruction', David Low, Evening Standard, 17 May 1933.
5. 'Last things first', Leslie Gilbert llingworth, 3 February 1947.