Government librarian Sara Duke mentioned a bookplate collection today - so I did a quick look in the Library of Congress catalogue and came up with this Bookplate of English caricaturist Phil May.
It's part of the 14,000-piece Ruthven Deane Bookplate Collection. It's out of copyright so you can download a hi-res version.
Years ago I wrote a brief piece for Hogan's Alley about Clifford Berryman's bookplates. It doesn't appear to be online anymore, so I'll recreate it here in the next day or so.