I have just been reading an excellent article on the Catacombs, in the 'Edinburgh Review.' It is a subject which has always interested me, but very likely I should not have begun with this particular article if I had not known it was by you. Circourt wrote to me about it, and so deprived me of the pleasure of finding it out for myself, which I think I could have done. But, in any case, the article is exceedingly interesting ... Though I have been enjoying myself in following you underground, what is now going on on the earth's surface calls for close attention. I am here hard by one of the old military roads which have led into Italy from time immemorial, as at this day. I hear that great preparations are being made all along the valley of the Rhone and the neighbouring country. What I am sure of, because it is taking place under my very eyes, is, that the railway from Marseilles to Toulon is being pushed forward at an unheard of rate. It is the only link wanting to complete the chain of communication between Brest, Cherbourg, Paris, and Toulon. There was no expectation of this railway being finished before the middle of summer; but now it is understood that it will be ready within a few days--an instance of doing the impossible. Such efforts presuppose some great object which it is desired to accomplish at once. I am told, perhaps incorrectly, that Prussia has decided to remain neutral--at first, at any rate; and, by the same authority, that Russia will be neutral, but in a spirit friendly to France. This would be very serious; for Russia gives nothing for nothing. If it is so, the Emperor's project would appear less silly. It would explain how an ambitious prince, whose throne is tottering, who is bound to excite the admiration of France and to gratify the national vanity, [Footnote: Fleury, one of the most faithful and attached of the Emperor's followers wrote in words almost identical (_Souvenirs_, tom. i. p. 330): 'C'etait par une serie de faits grandioses par des spectacles flattant l'orgueil et les instincts du pays, que Napoleon III allait, pendant de longues annees, non seulement occuper, rejouir la France, mais encore fixer l'attention, l'etonnement et bien souvent l'admiration du monde.'] who is stopped by no scruples, might find it an excellent opportunity for bringing on a personal war--if I may say so; for driving the Germans across the Alps and naming himself the Dictator of Italy. It is true that no great material advantage can result from it; but L. N. is sufficiently well acquainted with France to know that the glitter of such a course would probably content her. All this would be easy to understand if Maria Theresa reigned at Vienna, Frederic at Berlin, and Mme. de Pompadour at Versailles; in a word, if we were in the eighteenth instead of the nineteenth century. But being, as we are, in the nineteenth century, the designs which are ascribed to the Emperor are to be condemned