When the tormentors let him go, Voltaire rushed back into the house and appealed to the Duke of Sulli for vengeance, but in vain. It was no small matter to quarrel with the family of Rohan. Then the poet applied to the court for redress, but got none. It is said that Voltaire's enemies had persuaded the prime minister that his petitioner was the author of a certain epigram, addressed to His Excellency's mistress, in which she was reminded that it is easy to deceive a one-eyed Argus. (The minister had but one eye.) Finally Voltaire, seeing that no one else would take up his quarrel, began to take fencing lessons and to keep boisterous company. It is probable that he would have made little use of any skill he might have acquired as a swordsman. Voltaire was not physically rash. The Chevalier de Chabot, although he held the commission of a staff-officer, was certainly no braver than his adversary, and was in a position to take no risks. Voltaire was at first watched by the police; then, perhaps after sending a challenge, locked up in the Bastille. He remained in that state prison for about a fortnight, receiving his friends and dining at the governor's table. On the 5th of May, 1726, he was at Calais on his way to exile in England. [Footnote: Desnoiresterres, _Jeunesse_, 345.] Voltaire spent three years in England, years which exercised a deep influence on his life. He learned the English language exceptionally well, and practiced writing it in prose and verse. He associated on terms of intimacy with Lord Bolingbroke, whom he had already known in France, with Swift, Pope, and Gay. He drew an epigram from Young. He brought out a new and amended edition of the "Henriade," with a dedication in English to Queen Caroline. He studied the writings of Bacon, Newton, and Locke. Thus to the Chevalier de Chabot, and his shameful assault, did French thinkers owe, in no small measure, the influence which English writers exercised upon them. While in England, Voltaire was taking notes and writing letters. These he probably worked over during the years immediately following his return to France. The "Lettres Philosophiques," or "Letters concerning the English Nation," were first published in England in 1733. They were allowed to slip into circulation in France in the following year. Promptly condemned by the Parliament of Paris as "scandalous and contrary to religion and morals, and to the respect due to the powers that be," they were "torn and burned at the foot of the great staircase," and read all the more for it.