<i>Cassier's Magazine</i> of August 1897 had an article on page 380-392, written by John I. Thornycroft and titled <i>Steamers for shallow Rivers</i>. It was accompanied by a number of illustrations, including this photo of the <i>Boadicea</i>, on page 385.
Unknown photographer of the time
<a rel="nofollow" class="external text" href="https://archive.org/details/cassiersma121897newy">Cassier's Magazine at archive.org</a>