Description Ed Ruscha (b. 1937) Securing the Last Letter (Boss) signed, titled and dated 1964 (on the stretcher) oil on canvas 59 by 55 1/8 in. 149.9 by 140 cm. Executed in 1964. Provenance Ferus Gallery, Los Angeles Ed and Audrey Sabol, Villanova, Pennsylvania (acquired by 1967) Leo Castelli Gallery, New York (LC# ER 13) Acquired from the above in February 1988 by the present owner Literature Nancy Marmer, "Reviews: Edward Ruscha, Ferus Gallery," Artforum , December 1964, vol. 3, p. 12 Irving Blum, "The Antic Art of Edward Ruscha," Los Angeles Magazine , 1968, p. 32, illustrated David Bourdon, "A Heap of Words About Ed Ruscha," Art International , 1971, p. 26, illustrated Patricia Failing, “Ed Ruscha, Young Artist: Dead Serious About Being Nonsensical,” ARTnews , vol. 81, April 1982, p. 78 Ed Ruscha, Leave Any Information at the Signal: Writings, Interviews, Bits, Pages , Cambridge, 2002, p. 231 Exh. Cat., Philadelphia, The Gershman Y, A Happening Place: How the Arts Council Revolutionized the Philadelphia Art Scene in the Sixties, 2003, p. 18, illustrated in color (detail) Pat Poncy, ed., Edward Ruscha: Catalogue Raisonné of the Paintings, Volume One: 1958-1970 , New York, 2003, no. P1964.13, pp. 146-147, illustrated in color Richard D. Marshall, Ed Ruscha , London and New York, 2003, p. 42-43, illustrated in color Mark Stephen Archer, The New Formal: Interiors by James Aman , New York, 2016, p. 25, illustrated in color (in installation) John Thomason, "Norton's New Exhibition a Trove of Contemporary Art Riches," Boca Magazine , 16 March 2022, illustrated in color (online) Exh. Cat., New York, The Museum of Modern Art (and traveling), Ed Ruscha / Now Then: A Retrospective , September 2023 - January 2024, p. 159