lower right in graphite: March 28, 1969 / Downey; lower center in graphite: "Do Your Own Concert" Pressing the buttons or touching / the two plates at the same time, records elec- / tronic music that will be played back later / Sculpture conceived June '68; various graphite notations overall
Mr. and Mrs. Barrett M. Linde, Washington, DC; Corcoran Gallery of Art, Washington, DC, 1969; acquired 2015 by the National Gallery of Art
- Washington Art on Paper: 1962-1978, Corcoran Gallery of Art, Washington, DC; Center Gallery, Bucknell University, Lewisburg, Pennsylvania, 1979
- Simmons, Linda Crocker and with the assistance of Adrianne J. Humphrey, et al. American Drawings, Watercolors, Pastels, and Collages in the Collection of the Corcoran Gallery of Art. Washington, DC: Corcoran Gallery of Art, 1983: p. 259, no. 1707.