1872 Londonderry City by-election
... that the 1872 Londonderry City by-election was the first parliamentary election held by secret ballot in Ireland?
... that the <b id="mwARA"><a href="./1872_Londonderry_City_by-election" id="mwARE" rel="mw:WikiLink" title="1872 Londonderry City by-election">1872 Londonderry City by-election</a></b> was the first parliamentary election held by <a href="./Secret_ballot" id="mwARI" rel="mw:WikiLink" title="Secret ballot">secret ballot</a> in Ireland?