M. de Sausmarez (ed.), 'Ben Nicholson', Studio International, 1969, p. 71, illustrated, as 'c. 1932 (Charles I)'.
Exhibition catalogue, A Tribute to Ben Nicholson, London, Crane Kalman Gallery, 1974, n.p., no. 6, pl. 16, as 'c. 1931 (King Charles's statue)'.
London, Abdy & Co., Watercolours and Drawings by John Armstrong, John Banting, Frank Dobson, Geoffrey Houghton Brown, Robert Medley, Henry Moore, Paul Nash, Ben Nicholson, William Roberts, Edward Wadsworth and Richard Wyndham, December 1931 - January 1932, no. 36, 37 or 40.
London, Crane Kalman Gallery, A Tribute to Ben Nicholson, July - August 1974, no. 6, as 'c. 1931 (King Charles's statue)'.