Princess Royal's Battery
... that Spain attempted to silence Princess Royal's Battery during the 1727 siege by excavating a mine below it, to be loaded with explosives?
... that Spain attempted to silence <b id="mwD2c"><a href="./Princess_Royal's_Battery" id="mwD2g" rel="mw:WikiLink" title="Princess Royal's Battery">Princess Royal's Battery</a></b> during the <a class="mw-redirect" href="./Thirteenth_Siege_of_Gibraltar_(1727)" id="mwD2k" rel="mw:WikiLink" title="Thirteenth Siege of Gibraltar (1727)">1727 siege</a> by excavating a mine below it, to be loaded with explosives?