In the factory of the Atlantic City Packing Company men were toiling, stripped to the waist, in an inferno of heat. The huge row of vats that had once held clams, oysters and fish to grace a nation's palate, now simmered with green-phosphorescent kettles of molten lead; the hand trucks that once bore piles of canned goods to and fro now pushed by blue-faced men in khaki, held long stacks of pointed shells. In at one end of the building they came in ceaseless procession to pause before the lead tanks where the workmen took each shell and dipped its tip briefly in the lead, then returned it to the truck. Out the other end they wheeled to be loaded in trucks, buses, limousines, everything that had wheels and would move, to be rushed to the maw of the ceaselessly crying guns. For the offensive was on--the advance of the Lassans had been turned to a retreat. Along the water's edge, with its back to the sea and the steamers ready to pick up the survivors of the defeat of the last army of man, the last army of man had rallied; rallied and stood as the new lead-tipped shells began to come in and the artillery spouted them at the Lassan fighting-machines, no longer invincible, invulnerable monsters, but hittable and smashable pieces of mechanism. It was Ben Ruby in a tank shining dully with the new lead plating who led the charge against the Lassan fighting machines on the first day of the battle, and who, with his little division of American tanks, had encountered three of the huge Lassan monsters outside the city. For a moment, as though dazed by the audacity of this attack, they had done nothing at all. Then all three had turned the light-rays on him. Would it hold? The deadly rays glanced off, danced to the zenith in a shower of coruscating sparks and the gun of the American tank spoke--once, twice. A round hole, with a radiating star-pattern running out from it, appeared in the nose of the nearest Lassan fighting-machine, and it sank to the earth like a tired animal, rolling over and over, helpless. The other two turned to flee, swinging their long bodies around. Surrounded by shell-bursts, riddled by the lead-tipped weapons they too, struggled and sank, to rise no more. * * * * * After that there had been losses, of course. The Lassan shells occasionally burst in the back areas and claimed a toll. But the advance had gone on steadily for a whole day, unchecked; the Lassans were driven back. And then, as suddenly as they had come, they disappeared. South African aerial scouts, far ahead of the army, reported there was no sign of the enemy in the whole of New Jersey. The dodos vanished from the skies, the fighting machines from the earth. The Lassans seemed to have abandoned the struggle and retired to their underground city to wait for the end.