Bayfield group
... that the first Bayfield group quarry opened in 1868 on Basswood Island?
... that the first <b id="mwASY"><a href="./Bayfield_group" id="mwASc" rel="mw:WikiLink" title="Bayfield group">Bayfield group</a></b> quarry opened in 1868 on <a href="./Basswood_Island" id="mwASg" rel="mw:WikiLink" title="Basswood Island">Basswood Island</a>?