Actually I did go to that site first because I've seen it mentioned here in the thread. However, I saw nothing on that particular site that confirmed anything, nor where they got their written information from; the best I could find regarding if the figure was seen by guests was a pic with the caption "Here's what the Hatbox Ghost looked like inside the attraction", (
http://crocco.net/blog/images/hbghost01.jpg) which by itself doesn't confirm anything; the figure could of been in the ride and then removed prior to the official opening for guests. However, the site did give its source for the pic,
doombuggies.com, which was much more comprehensive and offered sources to back their information. From doombuggies.com:
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In "The 'E' Ticket" Magazine (No. 18), Tony Baxter (Senior VP, Walt Disney Imagineering) provides some unique insight into the infamous "Hatbox Ghost:"
"...My guess is that the Bride is currently in the exact location of the Hatbox Ghost, as there would be a hole in the floor for the base frame of the figure that would be useable at this point. During the pre-opening week (August 1st through the 7th) employees were invited to ride, and during the test rides for durability, we were able to ride for two to four hours at a time without getting off...The Hatbox Ghost was installed and running during this period. It is
possible (emphasis mine) that guests also rode in this time frame and saw the figure."
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The word "possible" still doesn't confirm it; it may of been there, it may not have. However, the article goes on by showing the aforementioned pic followed by:
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In this photo, contributed by Haunted Mansion fan Paul Clemens, you can even see the ghost's gleaming gold tooth! This figure is estimated to have been on display for a month or less, and this is the only known photo of the display as it was viewed by riders.
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A much better confirmation, as it apparently is a photo taken by a non-Disney person. While I have nothing against
hatboxghost.com, perhaps if it had a bit more detail in its captions as well as quoted sources, it might be a better overall website. (And, HMF, if hatboxghost.com is your site, please don't feel as though I'm ridiculing or belittling your site - I think it's a great site and with a little more work could be even better.)