 As the only member of the Second Dáil not elected to the Southern Ireland House of Commons, his status in the Third Dáil in 1922 was unclear.O'Mahony was not invited to attend the opening of the Provisional Parliament.De Valera was keen for him to attend since if he had been refused entry it would have demonstrated, in the minds of Anti-Treaty supporters, that the assembly was not an All-Ireland Dáil.