Illustrations by Henry Holiday (from The Hunting of the Snark, 1876) and Marcus Gheeraerts the Elder (Allegory of Iconoclasts, aka The Image Breakers, around 1567): In the “mouth” of Gheeraerts’ “head” a praying priest is depicted. The shape of the priest also is visible in the “mouth” of Holiday’s vanishing “Baker”.
There is more — with acknowledgments to Mahendra Singh, to John Tufail and to the Internet.
I started my Snark hunt in December 2008. http://www.artandpopularculture.com/User:Goetzkluge could give you an idea where I was in 2010. Many detours can be taken in the Snark hunting grounds.