Booth Notes Doc. 5, p. 2: 'Gypsies in wood with the subterranean cavern 15 m. from Rome painted for do. [P. Sandby]'; Booth Notes Doc. 9 (10 - Entrance to a Wood. Gypsies, old decay'd Tree. Rome in distance (was P. Sandby's) 16 1/2- 13 1/2.); WGC pp. 47, 73, 94, 110, 119-200, pl. 79b; Solkin 1982, p. 243; Williams 2011, pp. 36-37, repr.