Mignet's Histoire de la révolution française (1824), in support of the Liberal cause, was an enlarged sketch, prepared in four months, in which more stress was laid on fundamental theories than on the facts. In 1830, he founded Le National with Thiers and Armand Carrel, and signed the journalists' protest against the July Ordinances, however, he refused to profit from his party's victory. He was satisfied with the modest position of Director of the Archives at the Foreign Office, where he stayed till the revolution of 1848, when he was dismissed, and retired permanently into private life.