The sky was not yet alive with the whir of seaplanes, and the air remained undisturbed by the shattering roar of guns and shells. It was that brief space of time in which even Nature seems to hold her breath and make ready for the coming storm. The only movement other than the continued circling of destroyers was towards the shallow water close inshore, where powerful tugs were towing large barges--flat-bottomed craft carrying gigantic tripods made of railway metals. At predetermined places these were dropped overboard into the shallow sea and, with their legs embedded in the sandy bottom and their apices towering high above the surface, they formed observation platforms from which, in conjunction with aerial scouts, the fire of the big ships could be accurately directed on to the fortifications ashore. These tripods were laid a distance apart and quite away from the bombarding ships, but a system of range-finding and signalling had been organised and an officer chosen as a "spotter" in each trestle. The post of honour was on one or other of these observation towers, alone with the necessary instruments. The big shells from the shore batteries would scream overhead; some would plough up the water close by, smothering the tripod with spray, and the smaller guns would direct their fire against these eyes of the bombarding fleet. The chances were in favour of a hit, then there would be nothing left of the tripod or the spotter, simply a brief report to the Admiral Commanding that No. ---- observation post had been destroyed and later a fresh name in the casualty lists. It was, however, accepted as the fortune of war, and many volunteered. The sky brightened until a pale yellow glow suffused the east, while behind the bombarding fleet the western horizon was still a cold, hazy blue. A flight of seaplanes buzzed overhead and a few minutes later the dull reports of anti-aircraft guns echoed across the miles of still water. Tiny bright flashes from white puffs of smoke appeared in the central blue, and then having got the range the great guns of the monitors roared away their charges and the scream of shells filled the air. The calm of the morning vanished, and with it the oppressive silence which precedes a battle.