Ruth Law, from the cover of the May 5, 1917 issue of <i><a href="//commons.wikimedia.org/w/index.php?title=Billboard&amp;action=edit&amp;redlink=1" class="new" title="Billboard (page does not exist)">Billboard</a></i>.
No photographer credited.
<a rel="nofollow" class="external text" href="https://books.google.com/books?id=XaoiAQAAMAAJ&amp;lpg=RA3-PA18&amp;dq=%22Lois%20F.%20Clark%22%20actress&amp;pg=RA4-PA1#v=onepage&amp;q&amp;f=false">"Ruth Law: Daring American Aviatrix"</a>, <i>Billboard</i> (May 5, 1917): 1.