But Sergeant Walpole had no premonitions as he went back to his hammock on the porch. This was Post Number Fourteen, Sixth Area, Eastern Coast Observation Force. There was a war on, to be sure. There had been a war on since the fall of 1941, but it was two thousand miles away. Even lone-wolf bombing planes, flying forty thousand feet up, never came this far to drop their eggs upon inviting targets or upon those utterly blank, innocent-seeming places where munitions of war were now manufactured underground. Here was peace and quiet and good rations and a paradise for gold-brickers. Here was a summer bungalow taken over for military purposes, quartering six men who watched a certain section of coast-line for a quite impossible enemy. Three miles to the south there was another post. Three miles to the north another one still. They stretched all along the Atlantic Coast, those observation-posts, and the men in them watched the sea, languidly observed the television broadcasts, and slept in the sun. That was all they were supposed to do. In doing it they helped to maintain civilian morale. And therefore the Eastern Coast Observation Force was enviously said to be "just attached to the Army for rations," by the other services, and its members rated with M. P.'s and other low forms of animal life. Sergeant Walpole reclined in his hammock, inhaling comfortably. The ocean glittered blue before him in the sun. There was a plume of smoke out at sea indicating an old-style coal-burner, its hull down below the horizon. Anything that would float was being used since the war began, though a coal-burning ship was almost a museum piece. A trim Diesel tramp was lazing northward well inshore. A pack of gulls were squabbling noisily over some unpleasantness floating a hundred yards from the beach. The Diesel tramp edged closer inshore still. It was all very peaceful and placid. There are few softer jobs on earth than being a member of a "force in being" for the sake of civilian morale. * * * * * But at 2:32 P. M. the softness of that job departed, as far as Sergeant Walpole was concerned. At that moment he heard a thin wailing sound high aloft. It was well enough known nearer the front, but the Eastern Coast Observation Force had had no need to become unduly familiar with it. With incredible swiftness the wailing rose to the shrillest of shrieks, descending as lightning might be imagined to descend. Then there was a shattering concussion. It was monstrous. It was ear-splitting. Windows crashed in the cottage and tinkled to the sandy earth outside. There was a pause of seconds' duration only, during which Sergeant Walpole stared blankly and gasped, "What the hell?" Then there was a second thin wailing which rose to a scream....