Inscribed and numbered at lower center, in pen and brown ink, "Esculapio / XVIII".
Adams, Frederick B., Jr., comp. Ninth Report to the Fellows of the Pierpont Morgan Library, 1958 & 1959. New York : Pierpont Morgan Library, 1959, p. 100-102.
Pierpont Morgan Library. Review of Acquisitions, 1949-1968. New York : Pierpont Morgan Library, 1969, p. 178.
Stampfle, Felice, and Jacob Bean. Drawings from New York collections. III: The eighteenth century in Italy. New York : Metropolitan Museum of Art : Pierpont Morgan Library, 1971, no. 33.
Preparatory for an engraving in "Delle antiche statue greche e romane, che nell'antisala della Libreria di San Marco, e in altri luoghi pubblici di Venezia si trovano," Venice, I, 1740; II, 1743.
Zanetti, Antonio Maria, 1706-1778.
Quantock, John, former owner.
Gunter, Randolph, former owner.