This could not last. A circumstance which, when the mutual regard of the friends was in its first glow, would merely have been matter for laughter produced a violent explosion. Maupertuis enjoyed as much of Frederic's good will as any man of letters. He was President of the Academy of Berlin; and he stood second to Voltaire, though at an immense distance, in the literary society which had been assembled at the Prussian Court. Frederic had, by playing for his own amusement on the feelings of the two jealous and vainglorious Frenchmen, succeeded in producing a bitter enmity between them. Voltaire resolved to set his mark--a mark never to be effaced;--on the forehead of Maupertuis, and wrote the exquisitely ludicrous Diatribe of Doctor Akakia. He showed this little piece to Frederic, who had too much taste and too much malice not to relish such delicious pleasantry. In truth, even at this time of day, it is not easy for any person who has the least perception of the ridiculous to read the jokes on the Latin city, the Patagonians, and the hole to the centre of the earth, without laughing till he cries. But though Frederic was diverted by this charming pasquinade, he was unwilling that it should get abroad. His self-love was interested. He had selected Maupertuis to fill the chair of his Academy. If all Europe were taught to laugh at Maupertuis, would not the reputation of the Academy, would not even the dignity of its royal patron, be in some degree compromised? The King, therefore, begged Voltaire to suppress this performance. Voltaire promised to do so, and broke his word. The Diatribe was published, and received with shouts of merriment and applause by all who could read the French language. The King stormed. Voltaire, with his usual disregard of truth, asserted his innocence, and made up some lie about a printer or an amanuensis. The King was not to be so imposed upon. He ordered the pamphlet to be burned by the common hangman, and insisted upon having an apology from Voltaire, couched in the most abject terms. Voltaire sent back to the King his cross, his key, and the patent of his pension. After this burst of rage, the strange pair began to be ashamed of their violence, and went through the forms of reconciliation. But the breach was irreparable; and Voltaire took his leave of Frederic forever. They parted with cold civility; but their hearts were big with resentment. Voltaire had in his keeping a volume of the King's poetry, and forgot to return it. This was, we believe, merely one of the oversights which men setting out upon a journey often commit. That Voltaire could have meditated plagiarism is quite incredible. He would not, we are confident, for the half of Frederic's kingdom have consented to father Frederic's verses. The King, however, who rated his own writings much above their value, and who was inclined to see all Voltaire's actions in the worst light, was enraged to think that his favorite compositions were in the hands of an enemy, as thievish as a daw and as mischievous as a monkey. In the anger excited by this thought, he lost sight of reason and decency, and determined on committing an outrage at once odious and ridiculous.