A double-sided drawing by Knight is now available on eBay at the url
below. I call your attention to it because it's a very nice example and
there's an excellent scan. Note the compulsive doodling. This is typical and
the titanothere is a recurring subject in many of these drawings. Cat heads
are ubiquitous. DV
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=919611207