That webpage is such a precious resource. I was absolutely stunned the first time that I stumbled upon it too while net surfing.
Take a look at one of the Magus cards (the watercolour).
http://www.caduceusbooks.com/occultartgallery/harris/S_MAGICIAN.html It's very cool indeed. Apparently, it is the first rejected version of the Magician card, and not one of the two rejected versions that happen to come with the purple box US Games Thoth deck. That one is my favourite amongst any of the versions that Harris prepared.
That web page is a listing of items for sale, many of which are already sold. Let's hope that the images won't be taken down by the webmaster some day causing the loss of this resource.
P.S.: For example, it seems that the two Prince of Swords cards and the 8 of Swords cards are already taken down, or, at least, they don't work.