In 1804, George's recurrent illness returned; after his recovery, Addington resigned and Pitt regained power. Pitt sought to appoint Fox to his ministry, but George refused. Lord Grenville perceived an injustice to Fox, and refused to join the new ministry. Pitt concentrated on forming a coalition with Austria, Russia, and Sweden. This Third Coalition, however, met the same fate as the First and Second Coalitions, collapsing in 1805. The setbacks in Europe took a toll on Pitt's health and he died in 1806, reopening the question of who should serve in the ministry. Grenville became Prime Minister, and his "Ministry of All the Talents" included Fox. Grenville pushed through the Slave Trade Act 1807, which passed both houses of Parliament with large majorities. The King was conciliatory towards Fox, after being forced to capitulate over his appointment. After Fox's death in September 1806, the King and ministry were in open conflict. To boost recruitment, the ministry proposed a measure in February 1807 whereby Roman Catholics would be allowed to serve in all ranks of the Armed Forces. George instructed them not only to drop the measure, but also to agree never to set up such a measure again. The ministers agreed to drop the measure then pending, but refused to bind themselves in the future. They were dismissed and replaced by William Cavendish-Bentinck, 3rd Duke of Portland, as the nominal Prime Minister, with actual power being held by the Chancellor of the Exchequer, Spencer Perceval. Parliament was dissolved, and the subsequent election gave the ministry a strong majority in the House of Commons. George III made no further major political decisions during his reign; the replacement of Portland by Perceval in 1809 was of little actual significance.