upper left in plate: 76 / Borthwick Castle;'by later hand, lower right in graphite: L. 68
(Campbell Fine Art, London); Donald Vogler, Portland, OR; gift to NGA, 2017.
- Lumsden, E.S. "The etchings of John Clerk of Eldin." Print Collector's Quarterly 12 (1925): no. 68
- Bertram, Geoffrey. The Etchings of John Clerk of Eldin. Taunton, 2012: no. 81