Michael Aris, Views of medieval Bhutan : The diary and drawings of Samuel Davis, Smithsonian Institution Press, London and Washington, DC, 1982, pp. 84, 87, no. 24, DS485 .B503 D38 1982 Oversize (YCBA)Scott Wilcox, Line of beauty : British drawings and watercolors of the eighteenth century, , Yale Center for British Art, New Haven, CT, 2001, p. 96, no. 78, NC228 W53 2001 (YCBA)