The accident on the Matterhorn, triggered by Hadow, in an engraving by Gustave Doré. Hadow is second from the bottom, with Croz below him. The snapped rope above Hudson and Douglas is clearly seen.
^Burke, John, The Patrician Volume 1 (London, E. Churton, 1846) Births, Marriages, and Deaths (page 288) online at books.google.co.uk (accessed 10 April 2008)