Portrait of William L. Mayo featured in <a href="https://en.wikipedia.org/wiki/East_Texas_State_Normal_College" class="extiw" title="en:East Texas State Normal College">East Texas State Normal College</a>'s 1921 <i>Locust</i> yearbook.
<a href="https://en.wikipedia.org/wiki/East_Texas_State_Normal_College" class="extiw" title="en:East Texas State Normal College">East Texas State Normal College</a>
1921
Northeast Texas Digital Collections: <a rel="nofollow" class="external text" href="http://dmc.tamuc.edu/cdm/ref/collection/p15778coll9/id/3740">1921 <i>Locust</i> yearbook</a>