This image is provided courtesy of the National Portrait Gallery, London, under Creative Commons Licence Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0). The NPG claims copyright to this image. In certain other jurisdictions it is considered to be in the public domain.

© National Portrait Gallery, London. In certain other jurisdictions faithful digital reproductions of public domain works are considered to be in the public domain.