About the same time the village of Charonne, on the right extremity of the heights, was also carried, and the whole line of defence occupied by the right wing of the French fell into possession of the allies. Their light horse began to penetrate from Vincennes as far as the barriers of Paris, and their guns and mortars upon the heights were turned upon the city. The centre of the French army, stationed upon the canal de l'Ourcq, had hitherto stood firm, protected by the redoubt at Rouvroy, with eighteen heavy pieces of cannon, and by the village of La Villette, which formed the key of the position. But the right flank of their line being turned by those troops who had become possessed of Romainville, the allies overwhelmed this part of the line also; and, carrying by assault the farm of Rouvroy, with its strong redoubt, and the village of La Villette, drove the centre of the French back upon the city. A body of French cavalry attempted to check the advance of the allied columns, but were repulsed and destroyed by a brilliant charge of the black hussars of Brandenburgh. Meanwhile, the right wing of the Silesian army approached close to the foot of Montmartre, and Count Langeron's corps were preparing to storm this last remaining defensible post, when a flag of truce appeared, to demand a cessation of hostilities.
It appears that, in the morning, Joseph Buonaparte had shown himself to the defenders riding along the lines, accompanied by his staff, and had repeated to all the corps engaged, the assurance that he would live and die with them. There is reason to think, that if he did not quite credit that such extensive preparations for assault were made by a single division of the allies, yet he believed he had to do with only one of their two armies, and not with their united force. He was undeceived by a person named Peyre, called, by some, an engineer officer attached to the staff of the Governor of Paris, and, by others, a superintendent belonging to the corps of firemen in that city. Peyre, it seems, had fallen into the hands of a party of Cossacks the night before, and was carried in the morning to the presence of the Emperor Alexander, at Bondy. In his route, he had an opportunity of calculating the immense force of the armies now under the walls of Paris. Through the medium of this officer, the Emperor Alexander explained the intentions of the allied sovereigns, to allow fair terms to the city of Paris, provided it was proposed to capitulate ere the barriers were forced; with the corresponding intimation, that if the defence were prolonged beyond that period, it would not be in the power either of the Emperor, the King of Prussia, or the allied generals, to prevent the total destruction of the town.