Booth Notes Doc. 5, p. 3; Brownlow 1847, pp. 57-59; Whitley 1700-1799, vol. 1, p. 163; R.H. Nichols & F.A. Wray, The History of the Foundling Hospital, 1935, pp. 251, 261-62, repr. opp. p. 271; Waterhouse 1953, p. 174; WGC, p. 180, pl. 43a; B. Nicolson & J.F. Kerslake, The Treasures of the Foundling Hospital, 1972, pp. 81-82. no. 86, pl. 56; E.K. Waterhouse, British 18th Century Painters in Oils and Crayons, Woodbridge 1981; Solkin 1982, pp. 149-50 under no. 8; J. Marschner et al., eds, Enlightened Princesses: Caroline, Augusta, Charlotte, and the Shaping of the modern World, 1987, p. 420