But for an untoward event Sebastopol might have fallen on that very day, and the Crimea as a campaign have sunk into comparative historical insignificance. After four hours' firing a shell unluckily struck the magazine of Mount Rudolph, and with a roar which shook the surrounding camp the battery was destroyed. The French fire at once ceased, and was not renewed for two days. As for the British, they battered the Malakoff, reducing the stone-work to ruin, and silenced its guns. Soon afterwards the magazine of the Redan exploded, and though our fire still continued furiously, it was answered only feebly and at intervals, showing that the enemy too had suffered heavily like the French. And now let us consider, before returning to Phil and his comrades, why an assault was not delivered either at once, or on the following morning. But for the calamity to the French this would have occurred; owing, however, to the destruction of their chief battery, and the consequent failure to destroy the defences in front of them, assault became almost impracticable, while now that they were to some extent demoralised, it was utterly hopeless. Also it must be borne in mind that the force in Sebastopol was greatly superior in numbers to the Allies, while an attack in rear by the Russian army in the field was always to be dreaded, and, as will be seen, was not long in actually occurring. As to an assault on the following day, dawn showed that it was useless to attempt it, for the brave and energetic enemy had already reconstructed the defences, and made good all the damage that had been done. Almost a whole month had passed from the date of their incarceration, when one morning the prisoners in Sebastopol were awakened by a roar of exploding artillery. "What's that?" asked Phil, starting up suddenly and throwing off his blanket. "Listen, you fellows! Yes, there it goes again. That banging is the Russian artillery. Wait a minute and we shall hear our own at work." A moment later a distant, muttering growl told them that the Allies were answering the fire, while, had there been any doubt, a peculiar shriek overhead, which all had heard before, and the fall of a wall close at hand, told them that a shell from the far-off guns had found a mark. "Blow me!" exclaimed Tony excitedly. "Supposing one of them shells found its way in here!" "What, yer ain't afraid!" jeered a big rifleman who was amongst the prisoners. "You 'as helped to save the colours, too!" "Afraid! Booby! I'll punch yer head if yer don't mind what yer saying," retorted Tony hotly. "It ain't that I was thinking of, but of trying to get out of this. Supposing a hole got knocked in the wall, couldn't we chaps climb through it, and shy bricks at the sentries. Then we'd make a rush for it. You may bet all these Russian soldiers are busy in the forts."