After her death the French Government insisted that the Swiss Confederacy must compel Louis Napoleon to leave their territory. The Swiss refused, repaired the fortifications of Geneva, and made ready for a war with France; but Louis Napoleon of his own free will relieved the Swiss Government from all embarrassment by passing over into England, where it was not long before he made preparations for a new attempt to overthrow Louis Philippe's government. He lived quietly in London at that period, visiting few persons except Count D'Orsay at Gore House, the residence of Lady Blessington, and occupying himself a great deal with writing. He had already completed a Manual of Artillery, and was engaged on a book that he called "Les Idées napoléoniennes." Its principal "idea" was that France wanted an emperor, a definite head, but that she also needed extreme democratic principles. Therefore an empire ought to be founded on an expression of the will of the people,--in plain words, on universal suffrage. The mistake Napoleon III. made in his after career, as well as in his "Idées napoléoniennes," was in not perceiving that an empire without military glory would become a pool of corruption, while vast military efforts, which would embroil France with all Europe, would lose the support of the _bourgeoisie_. "In short," as Louis Blanc has said, "he imagined a despotism without its triumphs; a throne surrounded by court favorites, but without Europe at its footstool; a great name, with no great man to bear it,--the Empire, in short, _minus_ its Napoleon!" During the months that Louis Napoleon passed in London he was maturing the plot of a new enterprise. He was collecting round him his adherents, some of them Carbonaro leaders, with whom he had been associated in Italy. Some were his personal friends; some were men whose devotion to the First Napoleon made them ashamed to refuse to support his nephew, even in an insurrection that they disapproved; while some were mere adventurers. Very few persons were admitted to his full confidence; the affair was managed by a clique, "the members of which had been previously sounded; and in general those were set aside who could not embark in the undertaking heart and hand." By all these men Louis Napoleon was treated as an imperial personage. To the Italians he stood pledged, and had stood pledged since 1831, that if they helped him to ascend the throne of France, he would fight afterwards for the cause of Italy. This pledge he redeemed at Solferino and Magenta, but not till after some impatient, rash Italians (believing him forsworn) had attempted his assassination. In vain he was advised to wait, to let Louis Philippe's Government fall to the ground for want of a foundation. He had made his decision, and was resolved to adhere to it, not fearing to make that step which lies between the sublime and the ridiculous.