Conference of Engineers at the Menai Straits Preparatory to Floating one of the Tubes of the Britannia Bridge

by James Scott, after John Lucas
mezzotint, published 1868
NPG D10713

Statue of Joseph Locke

by Camille Silvy, after (Pietro) Carlo Giovanni Battista Marochetti, Baron Marochetti
albumen print, circa 1865
NPG Ax59331