In 1671 Ormond successfully opposed Richard Talbot's attempt to upset the Act of Settlement 1662. In 1673, he again visited Ireland, returned to London in 1675 to give advice to Charles on affairs in parliament, and in 1677 was again restored to favour and reappointed to the lord lieutenancy. On his arrival in Ireland, he occupied himself in placing the revenue and the army upon a proper footing. Upon the outbreak of the disturbances caused by the Popish Plot (1678) in England, Ormond at once took steps towards rendering the Roman Catholics, who were in the proportion of 15 to 1, powerless; and the mildness and moderation of his measures served as the ground of an attack upon him in England led by Shaftesbury, from which he was defended with great spirit by his own son Lord Ossory. While wary of defending Oliver Plunkett publicly, in private he denounced the obvious falsity of the charges against him - of the informers who claimed that Plunkett had hired them to kill the King he wrote that "no schoolboy would have trusted them with the design of robbing an orchard".