<i>Pioneer Mother</i> (1915) by Charles Grafly.
Charles Grafly (1862–1929), sculptor<br>Robert A. Reid, photographer
<i>The Blue Book: a comprehensive official souvenier book of the Panama-Pacific International Exposition at San Francisco, 1915</i> (San Francisco: Robert A. Reid, Official Publisher of Views Books, 1915), p. 5.<a rel="nofollow" class="external autonumber" href="https://archive.org/stream/bluebookcomprehe00pana#page/n7/mode/2up">[1]</a>