lower left in plate: Drawn by I. Mortimer; lower right in plate: Etch'd by I Haynes; lower center in plate: PILGRIMS. / / Publish'd as the Act directs Feby 1 1780 by J. Mortimer Norfolk Street Strand, & J. Boydell, Cheapside
(William Weston Gallery, London, 8 July 1985); Donald Vogler, Portland, OR; gift to NGA, 2017.
- Sunderland, John. "John Hamilton Mortimer: His Life and Works," Walpole Society 52 (1986): no. 79*a