Photographic portrait of <a href="https://en.wikipedia.org/wiki/Katharine_Stewart-Murray,_Duchess_of_Atholl" class="extiw" title="en:Katharine Stewart-Murray, Duchess of Atholl">Katharine Stewart-Murray, Duchess of Atholl</a>
Unknown (photographer not credited by the source or <i>The Times</i>)
Before 22 November 1923. <a rel="nofollow" class="external text" href="https://www.loc.gov/pictures/item/98519210/">Library of Congress</a> estimates the date as between 1900 and 1920.
Immediate source <a rel="nofollow" class="external free" href="https://www.amazon.com/Katharine-Marjory-Stewart-Murray-Duchess-Atholl/dp/B004J7GOM8">https://www.amazon.com/Katharine-Marjory-Stewart-Murray-Duchess-Atholl/dp/B004J7GOM8</a>. The same photograph appeared in <i>The Times</i> (London, England), Thursday, Nov 22, 1923; pg. 18; Issue 43505 (accessed from <a rel="nofollow" class="external autonumber" href="http://find.galegroup.com/ttda/infomark.do?&amp;source=gale&amp;prodId=TTDA&amp;userGroupName=southlib&amp;tabID=T003&amp;docPage=article&amp;searchType=AdvancedSearchForm&amp;docId=CS302191990&amp;type=multipage&amp;contentSet=LTO&amp;version=1.0">[1]</a>, subscription or UK library card required).