Nautical chart of the west coast of Africa from Cape Lopez Bay to St Paul de Loanda (Luanda). Compiled chiefly from setch surveys by Captain W.F.W. Owen, H.M.S. Leven 1825, with additions to 1911. Not current - not to be used for navigation!
<bdi><a href="https://en.wikipedia.org/wiki/en:United_Kingdom_Hydrographic_Office" class="extiw" title="w:en:United Kingdom Hydrographic Office"><span title="UK government agency concerned with providing hydrographic and marine geospatial data">United Kingdom Hydrographic Office</span></a>
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<a rel="nofollow" class="external free" href="https://collections.lib.uwm.edu/digital/collection/agdm/id/9061/rec/171">https://collections.lib.uwm.edu/digital/collection/agdm/id/9061/rec/171</a>