However, the Irish Parliament was still Protestant only, until the session of 1666, as Catholics had been barred from voting or standing for election under the Commonwealth. As a result, the Parliament amended the 1652 Act of Settlement so that land could be returned to "innocent Catholics"that is ones who had been Royalists in the civil wars and had not carried out massacres of English Protestantsbut only on the condition that the Cromwellian settlers be compensated with an equal amount of land elsewhere in Ireland. Since there was simply not enough land available for this to work, only the richer or grander Catholic landowners recovered their estates under this Act. These included the Viscount Dillon, Donough MacCarty, 1st Earl of Clancarty, Murrough O'Brien, 1st Earl of Inchiquin, Luke, the heir of Christopher Plunket, 2nd Earl of Fingall and Edmund Butler, 4th Viscount Mountgarret.