When the enthusiasm attending the entrance of the allies, which had converted a day of degradation into one of joy and festivity, began to subside, the perilous question occurred to those who found themselves suddenly embarked in a new revolution, Where were Napoleon and his army, and what means did his active and enterprising genius possess of still re-establishing his affairs, and taking vengeance on his revolted capital? That terrible and evil spirit, who had so long haunted their very dreams, and who had been well termed the nightmare of Europe, was not yet conjured down, though for the present he exercised his ministry elsewhere. All trembled for the consequence of his suddenly returning in full force, combined either with the troops of Augereau, or with the garrisons withdrawn from the frontier fortresses. But their fears were without foundation; for, though he was not personally distant, his powers of inflicting vengeance were now limited. We proceed to trace his progress after his movement eastward, from the neighbourhood of Vitry to St. Dizier, which had permitted the union of the two allied armies. Here he was joined by Caulaincourt, who had to inform him of the dissolution of the Congress at Chatillon, with the addition, that he had not received his instructions from Rheims, until the diplomatists had departed. Those subsequently despatched by Count Frochot, he had not received at all. Meanwhile, Napoleon's cavalry commenced the proposed operations in the rear of the allies, and made prisoners some persons of consequence, who were travelling, as they supposed, in perfect security, between Troyes and Dijon. Among these was Baron Weissemberg, who had long been the Austrian envoy at the court of London. The Emperor Francis was nearly surprised in person by the French light troops. He was obliged to fly in a _drosky_, a Russian carriage, attended only by two domestics, from Bar-sur-Aube to Chatillon, and from thence he retreated to Dijon![28] Napoleon showed every civility to his prisoner, Weissemberg, and despatched him to the Emperor of Austria, to solicit once more his favourable interference. The person of the present King of France[29] (then Monsieur) would have been a yet more important capture, but the forays of the light cavalry did not penetrate so far as to endanger him.