I am pretty zarking sure that neither of the books in Alice's story mentioned the color of her dress, and the illustrations were in black and white. She definitely had a bow-less headband in her hair, though. Of course, a former mathematician couldn't really be expected to dwell on such small details...even a left handed one.
And I always thought that the portal in the pool was the generic gateway to The Other World, the fairy realm, the cusp between realms, Joseph Campbell and all that jazz...then someone said that he thought it was based on a Disney movie.
Akril
...WAIT!!!! Dinah's kitten in Through the Looking Glass -- the one who's the Red Queen in the Looking Glass World -- is BLACK...and the cat in KQ7 is black too!!! Good golly gosh, I was so totally wrong! KQ7 is SO based on that Disney movie! Why didn't I notice that before!?