Inscribed at lower edge in graphite, "From.W.Lock Esq; Sewards Anecdotes".
Ryskamp, Charles, ed. Twenty-First Report to the Fellows of the Pierpont Morgan Library, 1984-1986. New York : Pierpont Morgan Library, 1989, p. 325.
Copy after W. Sharp's engraving of an illustration by Johann Heinrich Füssli in William Seward's "Anecdotes of Some Distinguished Persons", London, 1795-96.
Ryskamp, Charles, former owner.