"Shenandoah Valley," oil on canvas, by the artist William Louis Sonntag. Courtesy of the Virginia Historical Society.
<bdi><a href="https://en.wikipedia.org/wiki/en:William_Louis_Sonntag" class="extiw" title="w:en:William Louis Sonntag"><span title="American painter (1822-1900)">William Louis Sonntag, Sr.</span></a>
</bdi>
1859–1860
<a rel="nofollow" class="external free" href="http://www.the-athenaeum.org/art/full.php?ID=18281">http://www.the-athenaeum.org/art/full.php?ID=18281</a>