lower right in plate: P.Sandby Fecit.; lower left in plate: Publish'd according to Act of Parliament by P.Sandby St. Georges Row Sepr.1st.1776.; lower center in plate: CAERNARVON CASTLE.; upper left in plate: No.8.; by later hand, upper right verso in graphite: nm
Dr. Ruth B. Benedict (1913-1993), Washington; bequest to NGA, 1994.
- A Discerning Eye: Prints and Drawings Given by Ruth B. Benedict, National Gallery of Art, Washington, 1994, no. 46.
- Robertson, Bruce. The Art of Paul Sandby. New Haven, 1985: no. 93 (British Museum)
- Gunn, Ann V. The Prints of Paul Sandby (1731 - 1809). Turnhout, 2015: no. 222