F. Remington, O. Wister, Done in the Open: Drawings by Frederic Remington, New York, 1902, frontispiece illustration.
H. McCracken, Frederic Remington: Artist of the Old West, New York, 1947, p. 146.
H. McCracken, The Frederic Remington Book: A Pictorial History of the West, Garden City, New York, 1966, pp. 92, 276, no. 116, illustrated.
C.N. Gregg, "The Art of Frederic Remington," Connoisseur, vol. 165, no. 666, August 1967, p. 271, illustrated.
P.J. Broder, Bronzes of the American West, New York, 1974, pp. 372, 400, no. 476, illustrated.
The Kennedy Quarterly, vol. 15, June 1977, no. 3, p. 183, cover illustration.
D. Baker, Artists in our World: Frederic Remington, Chicago, Illinois, 1977, p. 48, illustrated.
Arizona Highways, Phoenix, Arizona, April 1985, no.4, vol. 61, pp. 12-13, illustrated.
T.W. Luke, Shows of Force: Power, Politics, and Ideology in Art Exhibitions, Durham, North Carolina, 1992, pp. 63-64 (as The Signal (If Skulls Could Speak)).
P.H. Hassrick, M.J. Webster, Frederic Remington: A Catalogue Raisonné of Paintings, Watercolors and Drawings, vol. II, Cody, Wyoming, 1996, pp. 617, 722, pl. 62, no. 2514, illustrated.
M.D. Greenbaum, Icons of the West: Frederic Remington's Sculpture, Ogdensburg, New York, 1996, pp. 95-96, fig. 5, illustrated.
R. Argyle, Scott Joplin and the Age of Ragtime, Jefferson, North Carolina, 2009, p. 39.
Oshkosh, Wisconsin, The Paine Art Center and Arboretum; Minneapolis, Minnesota, Minneapolis Institute of Arts; Williamstown, Massachusetts, Sterling and Francine Clark Art Institute, Frederic Remington: A Retrospective Exhibition of Painting and Sculpture, August 1-December 31, 1967, n.p., no. 43, illustrated.
New York, Wildenstein Gallery, How the West Was Won: Paintings, Watercolors, Bronzes by Frederic Remington and Charles Russell, May 22-June 22, 1968, n.p., no. 9, illustrated.
Cody, Wyoming, Buffalo Bill Historical Center, The Art of Frederic Remington: An Exhibition Honoring Harold McCracken, May 1-September 1, 1974, p. 1, no. 1, cover illustration.
Los Angeles, California, Gene Autry Western Heritage Museum; Youngstown, Ohio, Butler Institute of American Art; Denver, Colorado, Denver Art Museum; Indianapolis, Indiana, Eiteljorg Museum; Roanoake, Virginia, The Roanake Museum, The West Explored: The Gerald Peters Collection of Western American Art, November 1988-April 1990, p. 59, 87, pl. 38, illustrated (as The Signal (If Skulls Could Speak)).
Santa Fe, New Mexico, Gerald Peters Gallery; Chicago, Illinois, Mongerson-Wunderlich, Frederic Remington, May 3-July 31, 1991, pp. 78-79, illustrated.