This is a great set of images from my favorite sequence in Alice in Wonderland, when Alice meets the Caterpillar.
As I understand it, this was the very first sequence in the film that was fully animated, which might explain why there are RKO promotional stills of the storyboards for this sequence.
Storyboard stills are not very common, most of the stills released to the press were actual frames from the film, or promotional cel setups.
The art in these is just fantastic, executed I believe by Bill Peet.
An interesting fact about this sequence, the color styling of Alice's dress is different in this sequence from the rest of the film. If you look closely, you'll notice that the collar tabs on her dress are a lighter shade of blue than the rest of her dress.
Art of the caterpillar is difficult to come by, I feel quite fortunate to have these even in still form.