This was left out anonymously in the wee hours of Friday morning at the 1998 NPL Convention in Atlanta, as a fake Hidden Contest. However: (1) By that point (unbeknownst to me) the real Hidden Contest had already been solved; and (2) The item I had put out for people to go to to complete the last step of the fake Hidden Contest (which had a tag with an orthogonal-tour puzzle whose answer was "This is not the Hidden Contest") wasn't found by anybody. So as a cryptic it was doable, but as a fake Hidden Contest it was not a success.