Nun's Well
... that the British garrison of Gibraltar relied on water from the medieval Nun's Well for making their supply of beer?
... that the British garrison of <a href="./Gibraltar" id="mwCVA" rel="mw:WikiLink" title="Gibraltar">Gibraltar</a> relied on water from the medieval <b id="mwCVE"><a href="./Nun's_Well,_Gibraltar" id="mwCVI" rel="mw:WikiLink" title="Nun's Well, Gibraltar">Nun's Well</a></b> for making their supply of beer?