Ray Johnson, Ad Reinhardt Artforum, 1972-87, collage on cardboard panel. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Untitled (Mickey Mouse Urinating with Campbell's Soup Can), c. 1971, assemblage on cardboard panel. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Cupid with Tender Button, 1976, ink and watercolor painting on illustration board. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Untitled (Five Snakes, Jimmy Connors), 1975, collage on cardboard panel. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Untitled (May Wilson Western Union), 11.12.92, collage on illustration board. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Untitled (Ed Ruscha with Potato Masher), 1973-1981-1985-1986-1988, collage on cardboard panel. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Jim Rose Snake with Yellow Figure, 1992, collage on cardboard panel. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Untitled (Two Brown Italian Postage Stamps), 1975-85-88-1989+, collage on illustration board. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Ray Johnson Self Portrait with Ed Ruscha Works, 1975-81-86-87, collage on illustration board. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.

Ray Johnson, Untitled (Cupid with Correspondence Page), 1970, collage on illustration board. © The Ray Johnson Estate, Courtesy Richard L. Feigen & Co.