<i><a href="//commons.wikimedia.org/wiki/Diplodocus" title="Diplodocus">Diplodocus</a></i>
<bdi><a href="https://en.wikipedia.org/wiki/en:Charles_R._Knight" class="extiw" title="w:en:Charles R. Knight"><span title="American artist (1874-1953)">Charles R. Knight</span></a>
</bdi>
1912
Taken from the Early Image Website (www.copyrightexpired.com) "A sampling of my collection of Prehistoric Animal images published prior to 1923."<a rel="nofollow" class="external autonumber" href="http://www.copyrightexpired.com/earlyimage/prehistoriclifebeforekt/diplodocus_ma_1912_knight_1953.html">[1]</a>