I picked this up for cheap at the flea market a couple weeks ago and just fell in love with these illustrations. These aren't even half of the illustrations, there is an illustration every three or four pages in the book. Sometimes it looks like he is illustrating random sentences from the book, the randomness of it is one of the things that cracks me up.
The drawings remind of James Thurber at first glance. Like Thurber and Gary Larson, I love how he can put so much expression in a face with just a dot for an eye and line for a mouth. Particularly in the renderings of Polynesia the Parrot.