Portrait of Mr Koster, half-length in profile to the right, wearing a top hat and a bow tie
<br>Lithograph
<a rel="nofollow" class="external free" href="https://www.britishmuseum.org/collection/object/P_1913-1208-12">https://www.britishmuseum.org/collection/object/P_1913-1208-12</a>