Plate XXXV from <a href="https://en.wikipedia.org/wiki/Ancient_Monuments_of_the_Mississippi_Valley" class="extiw" title="w:Ancient Monuments of the Mississippi Valley">Ancient Monuments of the Mississippi Valley</a>. <a href="https://en.wikipedia.org/wiki/Serpent_Mound" class="extiw" title="w:Serpent Mound">Great Serpent</a> in <a href="https://en.wikipedia.org/wiki/Adams_County,_Ohio" class="extiw" title="w:Adams County, Ohio">Adams County, Ohio</a>.
<ul><li><a href="https://en.wikipedia.org/wiki/E._G._Squier" class="extiw" title="w:E. G. Squier">Ephraim George Squier</a> and <a href="https://en.wikipedia.org/wiki/Edwin_Hamilton_Davis" class="extiw" title="w:Edwin Hamilton Davis">Edwin Hamilton Davis</a>
<ul><li>derivative work: <a href="//commons.wikimedia.org/wiki/User:MagentaGreen" title="User:MagentaGreen">MagentaGreen</a></li></ul></li></ul>
<a href="//commons.wikimedia.org/wiki/File:SD35_Serpent_Mound_Squier_and_Davis_Plate_XXXV.png" title="File:SD35 Serpent Mound Squier and Davis Plate XXXV.png">File:SD35 Serpent Mound Squier and Davis Plate XXXV.png</a>