By "various hands." (Lucie-Smith, p.448). The following information is from the Mural Conservancy of Los Angeles: THE MURALS OF ESTRADA COURTS web page (http://www.lamurals.org/MuralFiles/ELA/EstradaCourts.html), accessed February 1,...
"The face of the artist in this painting is that of music critic and friend Howard Klein." (excerpt from: Lopate, Phillip, et al. John Koch: Painting a New York Life. New York: Historical Society; London: Scala, 2001, p.79)
"Prometheus and Hercules, a sculpture by Koch, sits on the windowsill between the artist and his model." (excerpt from: Lopate, Phillip, et al. John Koch: Painting a New York Life. New York: Historical Society; London: Scala, 2001, p.66)
