The House of Houdini
... that visitors to the collection at The House of Houdini can gain admittance only by decoding a secret message on their admission ticket?
... that visitors to the collection at <b id="mwB30"><a href="./The_House_of_Houdini" id="mwB34" rel="mw:WikiLink" title="The House of Houdini">The House of Houdini</a></b> can gain admittance only by decoding a secret message on their admission ticket?