H. Britzman and L. Hull, The West in Bronze, Los Angeles, California, p. 102, another example illustrated (as Night Herder).
F.G. Renner, Charles M. Russell: Paintings, Drawings, and Sculpture in the Amon Carter Museum, New York, 1974, p. 92, no. 61, another example illustrated.
R. Stewart, Charles M. Russell Sculptor, Fort Worth, Texas, 1994, pp. 82, 83, 98, 131(n.131), 281-85, fig. 2-75, other examples illustrated.