<bdi><a href="https://en.wikipedia.org/wiki/en:Caspar_David_Friedrich" class="extiw" title="w:en:Caspar David Friedrich"><span title="German painter">Caspar David Friedrich</span></a>
</bdi>
circa 1827-1828
Lewis, J. Patrick (2006) "<i>At Teach's Hole</i>" in Blackbeard: The Pirate King, Washington, D.C., United States: National Geographic <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-7922-5585-2" title="Special:BookSources/0-7922-5585-2">ISBN 0-7922-5585-2</a>.