For a more elaborate study of dockleaves in the Usher Art Gallery, Lincoln, see exhibition catalogue, Peter de Wint, Laing Art Gallery, Newcastle, Ferens Art Gallery, Kingston upon Hull and Bankside Gallery, London, 1985, p.31 no.34, illustrated in colour pl.3, where it is pointed out that de Wint used such studies for the foregrounds of his more finished watercolours.