Watermark: hunting horn, in heart-shaped shield (cf. Heawood 2646). Watermark (beta radiogrpah), hunting horn, Shield.
A study, in reverse, for the engraving of August by Andries Stock (Hollstein, XVIII, p. 92, no. 13) in the series of the months designed by Wildens and published in 1614.
Jones, Edward Powis, 1919-1998, donor.
Stampfle, Felice, with the assistance of Ruth S. Kraemer and Jane Shoaf Turner. Netherlandish Drawings of the Fifteenth and Sixteenth Centuries and Flemish Drawings of the Seventeenth and Eighteenth Centuries in the Pierpont Morgan Library. New York : Pierpont Morgan Library, 1991, p. 162, no. 339, repr.
Ryskamp, Charles, ed. Eighteenth Report to the Fellows of the Pierpont Morgan Library, 1975-1977. New York : Pierpont Morgan Library, 1978, p. 296.
Adler 1980, p. 25-27, 118, Z. 11, fig. 181.