center left plate printed in black ink: [the artist's butterfly]; lower left in graphite on the paper tab: [the artist's monogram] imp.; upper left verso in graphite by unknown hand: 4; lower left verso in graphite by unknown hand: B26957; lower right verso in graphite by unknown hand: FWOX.
Julius Garfinckel, Washington, DC; the Corcoran Gallery of Art, Washington, DC, 1938; acquired 2015 by the National Gallery of Art
- Kennedy, Edward G. The etched work of Whistler, illustrated by reproductions in collotype of the different states of the plates. 6 vols. New York: Grolier Club, 1910.
- MacDonald, Margaret, Grischka Petri, Meg Hausberg, and Joanna Meacock..James McNeill Whistler: The Etchings, a catalogue raisonné.University of Glasgow, 2012. on-line website at http://etchings.arts.gla.ac.uk