(Augusta) Ada King (née Byron), Countess of Lovelace

by Walker & Boutall, after Louis Ferrière
photogravure, late 19th century (1820)
NPG D11136

(Augusta) Ada King (née Byron), Countess of Lovelace

by Edward Scriven, published by John Samuel Murray, after Louis Ferrière
stipple engraving, published 15 April 1825 (1820)
NPG D37457