Booth Notes Doc. 4; Booth Notes Doc. 5, p. 1 [?]; Richard Wilson, 1966, pp. 6,8,fig.5 pl. XVII; Herrman 1973, p. 59, pl.54; Solkin 1982, p.241, no. 136a; London, Royal Academy & Washington D.C., National Gallery of Art, 1993, exh. cat., The Great age of British Watercolours, fig. 7'