Heritage Auctions is selling off a super-rare original 1957 prospectus for the Haunted Mansion, prepared by Ken Anderson as a first approximation of what Disneyland's "spook house" might be.
I happen to have browsed one of these, and I count myself lucky because I wasn't able to find anyone at Imagineering who'd ever seen it. Bidding stands at $1600.
The Haunted House/Haunted Mansion Disneyland Notes and Plans Group (Walt Disney, 1957). Here is one of the single most important lots we have ever offered in relation to Disneyland. After reviewing a Ghost House in one of Harper Goff's original concept sketches, Walt Disney gave the idea of a Ghost House to Ken Anderson. Mr. Anderson and Mr. Disney then visited the "Winchester Mystery House" in San Jose California. Walt asked Ken Anderson to create a story for a theme park haunted house. This is the group of extensive hand-typed notes and preliminary plans for a Disneyland "Haunted House." It is in a soft binder with a label that reads, "2nd Revision September 17 'The Haunted House' By Ken Anderson." This has his notes from the Winchester House visit, with his entire 24-page story for the attraction. The binder has a two-page table of contents and a spec page for the Winchester House. Also included are two small sheets with his notes on the Winchester House dimensions. Also included, a folded 30" x 18" architectural drawing print of the inside of the proposed ride. Print reads Ken Anderson 9/2/57. This plan is loose. The Front Elevation plan is in the last page of the binder and is a fold-out. Minor handling, edge wear and folds to two architectural plans. Good condition.