lower left in plate: Drawn by J. H. Mortimer / Publish'd as the Act directs July 19th, 1779 by R. Blyth; lower center in plate: Silenus; lower right in plate: Etch'd by R. Blyth
(Campbell Fine Art, London, 5 April 1992); Donald Vogler, Portland, OR; gift to NGA, 2017.
- Sunderland, John. "John Hamilton Mortimer: His Life and Works," Walpole Society 52 (1988): no. 72