Kevin Kidney, who is known by Disneyland fans for his incredible work on many of Disneyland's 50th Anniversary collectibles that were sold on DisneyShopping.com as well as some of the Enchanted Tiki Room 40th Anniversary collectibles, has a really great blog post showcasing many of the rare 1957 Sleeping Beauty Castle Walkthrough concept paintings by Eyvind Earle.
The images truly reveal how much Tony Baxter and his team respected and appreciated the original Walkthrough and the original Earle concepts. It's remarkable how close the concept art looks when compared to the newly re-opened Walkthrough.
You can see all of the concept paintings and read some interesting info about the Walkthrough art Kevin Kidney's blog: Kevin Kidney: Hail Aurora!
Here are a few of the concept paintings...