Once, however, they did catch the watchers at fault. At the corner of the defences called the Sikh Square, the warning sounds were mistaken for the trampling of horses tied up close by--a mistake first revealed by an explosion which made a breach in the works, overwhelming some of its defenders and hurling others into the air, most of whom came off with slight hurt. The Sepoys rushed on, but did not venture beyond the gap they had made, while some time passed before our men could dislodge them. One native officer was shot within the defences, the first and last time they were ever penetrated till they came to be abandoned. Of nearly forty mines attempted, this was the only one that could be called a success. Several unhappy drummers, buried among the ruins, cried lamentably for assistance; but the risk of going to their assistance under fire was too great. A brave fellow did steal forward, and with a saw attempted to release one of the men held down by a beam across his chest, but the Sepoys drove him back when they saw what he was at. These half-buried lads had all died a miserable death of suffocation or thirst, if not from their injuries, when towards nightfall a party of the 32nd, shielding themselves behind bullet-proof shutters, advanced to recapture the lost ground at the point of the bayonet, which they not only did, and barricaded the breach with doors, but, while they were about it, made a dash forth to blow up some small houses that had given cover to the enemy. This was one of several gallant sorties, in another of which Johannes' House was blown up, and the redoubtable "Bob the Nailer" killed in the act of exercising his deadly skill from the top of it. But his place as a marksman was taken by a brother negro of scarcely less fatal fame; and the enemy always expressed their resentment for these attacks by fresh bouts of more furious bombardment. Once, they had nearly destroyed a vital point of our line by piling up a bonfire against the Bailey Guard Gate; but Lieutenant R.H.M. Aitken, the burly Scot who held this post with his Sepoys, rushed out and extinguished the flames, under a rain of bullets, before much mischief could be done.