Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Daniel O'Connell and Joseph Hume encourage a dog with the head of Gisborne to leap at a bear with the head of Francis Bruen perching on a pole. Coloured lithograph by H.B. (John Doyle), 1839. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.