Silver Creek
... that Silver Creek was referred to by two different names on the same USGS map—and the locals had never heard of either name?
... that <b id="mwlA"><a class="mw-redirect" href="./Silver_Creek_(Susquehanna_River)" id="mwlQ" rel="mw:WikiLink" title="Silver Creek (Susquehanna River)">Silver Creek</a></b> was referred to by two different names on the same <a class="mw-redirect" href="./USGS" id="mwlg" rel="mw:WikiLink" title="USGS">USGS</a> map<span about="#mwt20" data-mw='{"parts":[{"template":{"target":{"wt":"mdash","href":"./Template:Mdash"},"params":{},"i":0}}]}' id="mwlw" typeof="mw:Transclusion">—</span>and the locals had never heard of either name?