1916
sheet: 10.2 x 20.4 cm (4 x 8 1/16 in.) board: 23.5 x 30.5 cm (9 1/4 x 12 in.) framed: 43 x 32 x 5 cm (16 15/16 x 12 5/8 x 1 15/16 in.)
Sold, [through, D. D. Strum, March 17, 1917]; to Sally Falk, Mannheim (1917-1919); Rudolf Pfrunder, Zurich (1919); Jsrael Ber Neumann (1919-1921). [Neumann Gallery, New York], sold; to Joy and Marion Levy (1948-2002); Joy Levy (2002-2015), by bequest; to the Busch-Reisinger Museum, 2015.

Watercolor on white wove paper
20th centurySwiss
Invisible physical energy on white wove paper. [The actual drawing is a blank sheet of wove paper placed into a handmade glassine envelope which is itself placed into a handmade white wove paper envelope which is then placed into a handmade brown card folder. There is also another handmade glassine envelope which contains a white printed card. The text on the latter reads: "A Couple of Wet Rocks/(invisible drawing/energy)"]
20th centurySwiss
Black ink, watercolor, and gouache on cream paper
19th-20th centurySwiss
Graphite on cream wove paper
20th centurySwiss
Watercolor and gouache on cream wove paper
20th centurySwiss
Mixed media on paper
20th centurySwiss
Graphite on cream wove paper
20th centurySwissGraphite on off-white paper
19th-20th centurySwissGraphite on mat board
20th centurySwiss
Red ink on off-white Japanese paper
20th centurySwiss
Watercolor on white wove paper
20th centurySwiss
Black ink over graphite on cream wove paper
20th centurySwiss