Dworn was bitterly wishing at this moment that he had had his beetle-machine again, and had been able to take an active part. As it was, he didn't even know surely just where in the battle line the beetles had taken up their position. A distant explosion, a single gunshot, rolled echoless across the flats. It was a signal. Even as the shell hit the ground close to the ranked drone aircraft, motors had begun to pulse and snarl all along the farflung line. The desert began to spew forth attackers. A motley horde of metal things, they darted, stalked, and lumbered from their lurking-places, and as they advanced to the assault the firing commenced in earnest, became a staccato thunder that blanketed but failed to drown out the beginning alarm-wail of a huge mechanical voice from the fortress of the drones. The enemy was not slow to react. Almost as the first rain of projectiles smashed down among them, jet engines began howling into life, and some of the fighter craft rocked into motion, wheeling out onto the runways. The encircling attackers well knew the peril of letting any of those pilotless killers get into the air. Shellfire was being concentrated on the airstrips, striving to block them, plow them up with craters. * * * * * A fighter drone came roaring out one of the runaways gathering speed and beginning to lift. Dworn followed it with his eyes, feeling sweat spring out on his forehead, repeating under his breath without conscious awareness of what he was saying: "Stop him, _stop_ him--" Then the enemy craft spun round in the air, belching smoke, came apart and spilled along the runway for a hundred yards. A second, coming close behind it, plowed into the wreckage of its comrade, rolled over and over and became a furiously burning pyre. That strip was blocked. All round the central hive smoke and flame were rising in innumerable places, from the paved ways and from the open desert. On another launching strip, just visible through the mounting inferno, one of the big queen-craft had sought to take to the air, and had been knocked out by heavy shellfire. Now its upended and blazing hulk tilted slowly over and collapsed burying beneath it several of the little wingless workers. In all the confusion these still scurried hither and yon, oblivious to the bombardment, laboring frantically but futilely to clear away the debris. Their efforts were useless, while the rain of explosives from the tightening ring of assault forces continued adding to the ruin and disorder within the hive.... Dworn sprang to his feet for a better view. He hugged Qanya to him till she gasped for breath, shouted in her ear over the thunder of the barrage, "_We've got them!_" Close to the ridge where they stood a line of many-wheeled monsters rolled past--scorpions, moving along the battle front and, whenever the thickening smoke up ahead revealed a target, halting to wheel round and discharge their heavy-caliber tail guns.