It may remain an inspiration to others, as it assuredly is a proof of the temperance and moderation of his own life, that much of Voltaire’s best work was done after he had reached his sixtieth year. _Candide_, his masterpiece, was written at the age of sixty-four. Four years later he produced his _Sermon of the Fifty_, and he was sixty-nine when he published his epoch-making _Treatise upon Toleration_, and _Saul_, the wittiest of his burlesque dramas. At the age of seventy he issued his most important work, the _Philosophical Dictionary_, and his burlesque upon existing superstitions, which he entitled _Pot-Pourri_. This was, indeed, the period of his greatest literary activity against “l’Infame.” His _Questions on the Miracles_, his _Examination of Lord Bolingbroke_, the _Questions of Zapata_, the _Dinner of Count de Boulainvilliers_ (the charming _resumé_ of Voltaire’s religious opinions, which had the honor to be burnt by the hand of the hangman), the _Canonisation of St. Cucufin_, the romance of the _Princess of Babylon_, the _A. B. and C._, the collection of _Ancient Gospels_, and his _God and Men_, all being issued while he was between seventy and seventy-five. It was at this time he edited the _Recueil Nécessaire avec l’Evangile de la Raison_, a collection of anti-Christian tracts dated Leipsic and London, but printed at Amsterdam. He was eighty when he put forth his _White Bull_ (one of the funniest of his pieces, which was translated by Jeremy Bentham), and his ridiculous skit on Bababec and the Fakirs; eighty-two when he wrote _The Bible Explained_ and _A Christian against Six Jews_; and eighty-three when he published his _History of the Establishment of Christianity_. It was thus in the last twenty years of his long life that Voltaire did his best work for the destruction of prejudice and the spread of enlightenment. At the same time he maintained a large correspondence, both with the principal sovereigns of Europe, whom he urged in the direction of tolerance, and with the leading writers, whom he wished to combine in a great and systematic attempt to sap the creed he believed to be at the root of superstition and intolerance.