https://web.archive.org/web/20090301085254/http://djelibeibi.unex.es/libros/Tenniel/|title=John Tenniel's illustrations for Alice's Adventures in Wonderland and Through the Looking-Glass (en)
https://web.archive.org/web/20131019103746/http://www.wakeling.demon.co.uk/page10-Tenniel.htm|title=John Tenniel – Essay by Edward Wakeling – March 2008 (en)
https://web.archive.org/web/20071213002616/http://arthist.cla.umn.edu/aict/Tennielweb/directory.html|title=A collection of Tenniel's American Civil War-era illustrations (en)