By the end of November, railway communication had been restored up to Chelles, but the greater part of the ammunition had meanwhile been deposited at Lagny, and from thence would now have to be carried forward by the country roads. The ordinary two-wheeled country carts proved totally unfit for the transport of shells, and only 2000 four-wheeled waggons had been collected by requisitions made over a wide area. There were brought up from Metz 960 more with horses sent from Germany, and even the teams of the IIIrd Army were taken into the service, though they were almost indispensable just then to contribute towards the efficiency of the army fighting on the Loire. Finally, all the draught horses of the pontoon columns, of the field-bridge trains, and of the trench-tool columns were brought into the ammunition-transport service. A new difficulty arose when the breaking-up of the ice necessitated the removal of the pontoon bridges over the Seine. The roads were so bad that it took the waggons nine days to get from Nanteuil to Villacoublay and back. Many broke down under their loads, and the drivers constantly took to flight. And moreover, at the instance of the Chief of the Staff there was now laid upon the artillery yet an additional task to be carried out forthwith. Though the besieged had not hitherto succeeded in forcing their way through the enemy's lines, they now set about widening their elbow room, with intent that by their counter-approaches the ring of investment should be further and yet further pushed back, until at last it should reach the breaking point. On the south side the French entrenchments already extended beyond Vitry and Villejuif to the Seine; and on the north, between Drancy and Fort de l'Est, there was an extensive system of trenches and batteries reaching to within 1100 yards of Le Bourget, which in part might in a manner be dignified with the title of a regular engineer-attack. The hard frost had indeed hindered the further progress of these works, but they were armed with artillery and occupied by the IInd Army. And further, a singularly favourable point of support for a sortie to the east as well as to the north, was afforded to the French in the commanding eminence of Mont Avron, which, armed with seventy heavy guns, projected into the Marne valley like a wedge between the northern and southern investing lines. (BOMBARDMENT OF MONT AVRON, DECEMBER 27TH.)--In order to expel the French from this position fifty heavy guns from Germany, and twenty-six from before La Fere were brought up under the command of Colonel Bartsch. By the exertions of a whole battalion as a working party, two groups of battery emplacements were erected in spite of the severe frost on the western slope of the heights behind Raincy and Gagny, and on the left upland of the Marne Valley near Noisy le Grand, thus encompassing Mont Avron on two sides at a distance of from 2160 to 3250 feet.