William H. Roberts House
...that the William H. Roberts House is the only property in Pecatonica, Illinois listed on the U.S. National Register of Historic Places?
...that the <b id="mwBdc"><a href="./William_H._Roberts_House" id="mwBdg" rel="mw:WikiLink" title="William H. Roberts House">William H. Roberts House</a></b> is the only property in <a href="./Pecatonica,_Illinois" id="mwBdk" rel="mw:WikiLink" title="Pecatonica, Illinois">Pecatonica, Illinois</a> listed on the U.S. <a href="./National_Register_of_Historic_Places" id="mwBdo" rel="mw:WikiLink" title="National Register of Historic Places">National Register of Historic Places</a>?