"Four," said Reuben. "I remember because one of my best Servers was killed by a falling corridor roof—the only fatality and it had to happen to my team!" He laughed nervously and realized that he was talking like a fool, but May seemed not to notice. Far below them, there was a series of screaming whistles as the interceptors were loosed to begin their intricate, double basketwork wall of defense in a towering cylinder about Denv. "Go on, Reuben," said May. "That was most interesting." His eyes were searching the underside of the steel table. Reuben averted his own eyes from the frightened face, feeling some awe drain out of him. Under a table with a general! It didn't seem so strange now. "Perhaps, sir, you can tell me what a puzzling thing, that happened this afternoon, means. A fellow—Rudolph's man Almon, of the eighty-ninth level—gave me a pair of binoculars that flashed in my eyes and then went opaque. Has your wide experience—" May laughed hoarsely and said in a shaky voice: "That old trick! He was photographing your retinas for the blood-vessel pattern. One of Rudolph's men, eh? I'm glad you spoke to me; I'm old enough to spot a revival like that. Perhaps my good friend Rudolph plans—" There was a thudding volley in the air and then a faint jar. One had got through, exploding, from the feel of it, far down at the foot of Denv. The alarm roared again, in bursts that meant all clear; only one flight of missiles and that disposed of. The Atomist and the general climbed out from under the table; May's secretary popped through the door. The general waved him out again and leaned heavily on the table, his arms quivering. Reuben hastily brought a chair. "A glass of water," said May. The Atomist brought it. He saw the general wash down what looked like a triple dose of XXX—green capsules which it was better to leave alone. May said after a moment: "That's better. And don't look so shocked, youngster; you don't know the strain we're under. It's only a temporary measure which I shall discontinue as soon as things ease up a bit. I was saying that perhaps my good friend Rudolph plans to substitute one of his men for one of mine. Tell me, how long has this fellow Almon been a friend of yours?" "He struck