In the fortress of Turin he remained immured during the last twelve years of his life, although part of his time was spent in composing a defence of the Sardinian interests as opposed to those of the papal court, and he was led to sign a retractation of the statements in his history most obnoxious to the Vatican (1738).
Although Du Pin consented to a retractation, the book was suppressed in 1693; he was, however, allowed again to continue it on changing its title by substituting nouvelle for universelle.
The abbe again declared "it is impossible for me honestly and sincerely to make the act of absolute retractation and submission exacted by the sovereign pontiff."
The Bourbon sovereigns threatened to make war on the pope in return (France, indeed, seizing on the county of Avignon), and a joint note demanding a retractation, and the abolition of the Jesuits, was presented by the French ambassador at Rome on the 10th of December 1768 in the name of France, Spain and the two Sicilies.
Although this charge was demonstrably false, Randolph when confronted with it immediately resigned, and subsequently secured a retractation from Fauchet; he published A Vindication of Mr Randolph's Resignation (1795) and Political Truth, or Animadversions on the Past and Present State of Public Af f airs (1796).