Pseudopentaceros richardsoni
Smith, Andrew, Sir, 1797-1872; Macleay, William Sharp, 1792-1865; Great Britain. Treasury; Cape of Good Hope Association for Exploring Central Africa; Day &amp; Haghe, lithographer
<a rel="nofollow" class="external text" href="https://archive.org/stream/illustrationsofz14smit#page/n97/mode/1up">Illustrations of the zoology of South Africa</a>