Frederick the Great used to call the French the first letter-writers of Europe, and it is probable that their national turn for clever gossip gives to their epistles a sort of general interest, for in no other country have letters formed so large a portion of published literature. This was particularly true in Frederick's own age. Never did a death or a quarrel take place--and the latter was not rare among the _savants_ of that period--but comfort or satisfaction was sought in the immediate publication of every scrap of correspondence, to the manifold increase of disputes and heartburnings. Some of the most amusing volumes extant were thus given to the world; and Madame Dunoyer's, though scarcely of that description, must not be forgotten from the tale of its origin. When Voltaire was a young attaché to the French embassy at the Hague, with no reputation but that of being rather unmanageable by his family and confessor, he was on billet-doux terms, it seems, with madame's daughter; but madame found out that he was poor, or something like it, for in no other respect was the lady scrupulous. Her veto was therefore laid on the correspondence, which nevertheless survived under interdict for some time, till Voltaire left the embassy, and it died of itself; for he wrote the "Oedipe," became talked of by all Paris, and noticed by the Marquis de Vellers. Gradually the man grew great in the eyes of his generation, his fame as a poet and philosopher filled all Europe, not forgetting the Hague; and when it had reached the zenith, Madame Dunoyer collected his letters to her daughter, which remained in her custody, the receiver being by this time married, and published them at her own expense in a handsomely-bound volume. Whether to be revenged on fortune for permitting her to miss so notable a son-in-law, or on him for obeying her commands, it is now impossible to determine, but her book served to show the world that the early billets-doux of a great genius might be just as milk-and-watery as those of common people.