sentences:  Four years after initially deselecting Barber, the Liberal Party readopted him at the 1875 election, thus preventing Lyon from contesting the riding of Halton on behalf of the party.However, in June 1875, Barber's re-election to a third term in office was deemed void in a subsequent election trial that had been brought about by petition.With Barber's unseating, the Liberal Party convened to determine a new candidate in the consequential by-election; on October 4, they chose Lyon.