Nautical chart of the east coast of Africa from Zanzibar to Malindi.  Surveyed by Commander W.J.L. Wharton and the officers of H.M.S. Shearwater and Fawn, 1873-8; and by Commander T.F. Pullen, Lieutenant and Commander A.F. Balfour, and the Officers of H.M. Surveying Ship Stork, 1888-90.  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/8745/rec/222">https://collections.lib.uwm.edu/digital/collection/agdm/id/8745/rec/222</a>