O'Sullivan will be disbelieved by nine-tenths of this population. They believe only what they wish to believe. M. Rochefort has issued a "poster" begging citizens not to construct private barricades. There must, he justly observes, be "unity in the system of interior defences." The _Reveil_ announces that the Ultras do not intend to proceed to revolutionary elections of a municipality to-morrow, because they have hopes that the Government intend to yield on this question. The Prefect of the Police is actively engaged in an attempt to throw light upon Pietri's connection with the plots which periodically came to a head against the Empire. Documents have been discovered which will show that most of these plots were got up by the Imperial police. Pietri, Lagrange, and Barnier, a _juge d'instruction_, were the prime movers. A certain Bablot received 20,000fr. for his services as a conspirator. The complaints of the newspapers against the number of young men who avoid military duty by hooking themselves on in some capacity or other to an ambulance are becoming louder every day. For my part I confess that I look with contempt upon any young Frenchman I meet with the red cross on his arm, unless he be a surgeon. I had some thoughts of making myself useful as a neutral in joining one of these ambulances, but I was deterred by what happened to a fellow-countryman of mine who offered his services. He was told that thousands of applicants were turned away every day, and that there already were far more persons attached to every ambulance than were necessary. Dr. Evans, the leading spirit of the American ambulance, the man whose speciality it was to have drawn more royal teeth, and to have received more royal decorations than any other human being, has left Paris. Mr. Washburne informs me that there are still about 250 Americans here, of whom about forty are women. Some of them remain to look after their homes, others out of curiosity. "I regard," said an American lady to me to-day, who had been in a southern city (Vicksburg, if I remember rightly), when it was under fire, "a bombardment as the finest and most interesting effort of pyrotechnical skill, and I want to see if you Europeans have developed this art as fully as we have, which I doubt." _October 2nd._