Detail showing the Bight of Biafra from a map by Herman Moll, 1729, showing "NEGROLAND and GUINEA. With the European Settlements, Explaining what belongs to England, Holland, Denmark etc.
<bdi><a href="https://en.wikipedia.org/wiki/en:Herman_Moll" class="extiw" title="w:en:Herman Moll"><span title="18th-century English cartographer">Herman Moll</span></a>
</bdi>
1729
Atlas Minor, originally published in 1727." 20.1 X 27 cm. Published in London. The map shows the area from  the Tropic of Cancer to Cameroon. From <a rel="nofollow" class="external text" href="http://www.uflib.ufl.edu/maps/MAPAFRICA-C.HTML">The University of Florida Map &amp; Image Library</a>.