This is the single remaining photo of Ahmadu Bamba and was most likely photographed before 1923.  Apparently, no one owns a copyright and it has come down to us through being reproduced in countless photo labs and by photocopying.
<a href="https://en.wikipedia.org/wiki/Image:AhmaduBamba.jpg" class="extiw" title="en:Image:AhmaduBamba.jpg">en:Image:AhmaduBamba.jpg</a>