They had not walked fifty yards when a terrific explosion rent the air, deafening their ears and almost knocking them backward. Immediately afterwards the thunder of heavy artillery broke out to their right, and the mist beyond them was fitfully illuminated by lurid flashes. Brought to a momentary stop, Jack again went forward, with eyes and ears painfully strained, every fantastic eddy of the mist presenting itself as a possible enemy. Suddenly he looked round to see that Pepito was with him. The boy was gone! Retracing his steps, he peered through the gloom, calling the gipsy’s name softly. There was no answer, no sign of him. Five minutes were spent in fruitless search; then, within a few yards of him, Jack heard the tramp of men marching rapidly in file. With a mixed feeling of annoyance and anxiety he turned and made off in the opposite direction, crossed the district known as the Tanneries, and after wandering about for nearly an hour, dodging footsteps, and seeing with concern the mist clearing, arrived at the turning of the Casa Ximenez just in time to assist the young lady then so urgently needing assistance. Still anxious about the safety of the gipsy boy, Jack felt, after leaving the house in the Coso, that he could do nothing at the moment, and his first duty was to present his despatch to General Palafox. The sounds of combat hurtled in the air; behind him clouds of smoke and flame bore witness to the success of the French bombardment. The street was full of men, women, citizens, soldiers, priests, hastening from point to point, all armed, all with fury and grim determination printed on their worn features. Stopping a boy who was hauling along a barrow filled with powder, Jack asked him where General Palafox could be found. "In the Palace of the Inquisition, by the Portillo Gate," replied the boy in surprise, scarcely stopping to answer the question, and hurrying on again with his fatal load. Before he had gone fifty yards a bomb fell into the barrow, and, unknown to Jack, this little defender of Saragossa was blown into eternity.