The effects of the discharge of the motor-bomb astonished and even startled those on board the repellers and the crabs. At the instant of touching the button a hydraulic shock was felt on Repeller No. 1. This was supposed to be occasioned the discharge of the motor, but it was also felt on the other vessels. It was the same shock that had been felt on shore, but less in degree. A few moments after there was a great heaving swell of the sea, which tossed and rolled the four vessels, and lifted the steel protecting net so high that for an instant parts of it showed themselves above the surface like glistening sea-ghosts. Experiments with motor-bombs had been made in unsettled mountainous districts, but this was the first one which had ever exerted its power under water. On shore, in the forts, and in the city no one for an instant supposed that the terrific phenomenon which had just occurred was in any way due to the vessels of the Syndicate. The repellers were in plain view, and it was evident that neither of them had fired a gun. Besides, the firing of cannon did not produce such effects. It was the general opinion that there had been an earthquake shock, accompanied by a cloud-burst and extraordinary convulsions of the sea. Such a combination of elementary disturbances had never been known in these parts; and a great many persons were much more frightened than if they had understood what had really happened. In about half an hour after the discharge of the motor-bomb, when the sea had resumed its usual quiet, a boat carrying a white flag left Repeller No. 1, rowed directly over the submerged net, and made for the harbour. When the approach of this flag-of-truce was perceived from the fort nearest the mouth of the harbour, it occasioned much surmise. Had the earthquake brought these Syndicate knaves to their senses? Or were they about to make further absurd and outrageous demands? Some irate officers were of the opinion that enemies like these should be considered no better than pirates, and that their flag-of-truce should be fired upon. But the commandant of the fort paid no attention to such counsels, and sent a detachment with a white flag down to the beach to meet the approaching boat and learn its errand. The men in the boat had nothing to do but to deliver a letter from the Director-in-chief to the commandant of the fort, and then row back again. No answer was required. When the commandant read the brief note, he made no remark. In fact, he could think of no appropriate remark to make. The missive simply informed him that at ten o'clock and eighteen minutes A. M., of that day, the first bomb from the marine forces of the Syndicate had been discharged into the waters of the harbour. At, or about, two o'clock P.M., the second bomb would be discharged at Fort Pilcher. That was all.