But in addition to these instructions Guizot carried back with him to London a letter from Louis Philippe to his son-in-law, the King of the Belgians. Leopold was at Windsor Castle, consumed with anxiety at the thought of the dangers to which a European war must expose his newly established Kingdom. Louis Philippe's letter of August 13 was plainly intended to be read by Queen Victoria, and was drawn up with the object of seriously alarming her, and of prejudicing her against Palmerston. "The situation in which France finds herself," wrote the King, "is neither of her choice nor of her creation. It was said of the death of the Duc d'Enghien that it was worse than a crime, it was a blunder. I say now of the Treaty of July 15, that it is worse than a blunder, it is a misfortune of which the consequences are incalculable. The situation is particularly painful for me who have always scouted the notion that England could ever enter into an alliance without France. I find I am wrong. For the present we can only wait and see. But there is one thing we must do and that is to arm, and we are doing so vigorously. Our _rôle_ must be one of expectation. We must see what England means to do, before deciding what France shall do, either in the way of restoring or preserving the balance of power."[587]
A few hours before M. Guizot departed from England to visit the King at Eu, a steamer left the Thames having on board Louis Napoleon, who, with some fifty followers, a tame eagle and a bundle of proclamations, purposed to overthrow the Orleans Monarchy. His destination was Boulogne, where a subaltern officer of the garrison had been drawn into the plot. On the morning of August 6, the Imperial Pretender disembarked at Vimereux and presented himself before the 42nd regiment upon the barrack square. But his appearance aroused no enthusiasm. Finding that their plans had miscarried, the conspirators attempted to regain their ship. Their flight was, however, intercepted by the police and the national guards, who captured the whole party and lodged them in the gaol. Four years before Louis Napoleon had made a similar attempt at Strasburg. On that occasion he had not been brought to trial, but had simply been placed on board a ship and sent off to America. This second offence, however, could not be treated with the same leniency. On September 28, he was arraigned before the peers and sentenced to perpetual imprisonment in the fortress of Ham. The affair excited little public interest and was generally treated with contemptuous indifference. Certain French newspapers, however, published accounts of meetings between the Pretender and Palmerston, and declared that his attempt must have been connived at by the British government. But at his first interview with Baron Bourqueney, who had come over to London to take charge of the embassy during the absence of Guizot, Palmerston was enabled to pledge his word of honour that, for "the past two years, neither he nor Lord Melbourne had set eyes upon Louis Bonaparte or upon any of the adventurers by whom he was surrounded."[588] His assurance was readily accepted and the matter was quickly forgotten.