Rare 1957 First Concept of Disneyland Haunted Mansion by Ken Anderson

You may know that, originally, the Haunted Mansion ride was supposed to be a walk-through instead than the ride we know using Omnimovers. Well, Heritage Auctions put on sale a rare and fascinating original 1957 document that we thought we would never see, prepared by Ken Anderson at the request of Walt for a Haunted