Star Gazers' Stone
... that Charles Mason and Jeremiah Dixon transported their zenith telescope on a featherbed 31 miles from Philadelphia to Star Gazers' Stone to begin surveying the Mason-Dixon line?
... that <a href="./Charles_Mason" id="mwFp4" rel="mw:WikiLink" title="Charles Mason">Charles Mason</a> and <a href="./Jeremiah_Dixon" id="mwFp8" rel="mw:WikiLink" title="Jeremiah Dixon">Jeremiah Dixon</a> transported their <a href="./Zenith_telescope" id="mwFqA" rel="mw:WikiLink" title="Zenith telescope">zenith telescope</a> on a featherbed 31 miles from Philadelphia to <b id="mwFqE"><a href="./Star_Gazers'_Stone" id="mwFqI" rel="mw:WikiLink" title="Star Gazers' Stone">Star Gazers' Stone</a></b> to begin surveying the <a class="mw-redirect" href="./Mason-Dixon_line" id="mwFqM" rel="mw:WikiLink" title="Mason-Dixon line">Mason-Dixon line</a>?