* * * * * I had been ready for days now, postponing the moment. And those days were marching to the time of war, the rebels were quivering to go, a scant few weeks at most lay between me and the ruin of Valgolian plans and work and hope. In my steadily expanding official capacity, I could go anywhere and do almost anything in an engineering line. So, bit by bit, I had tinkered with the base's general alarm system. We had scoutships posted, of course, but by the very nature of things they had to be close to the planet or an approaching enemy would slip between them without detection. And the substantial vibrations of a ship traveling faster than light do not arrive much ahead of the ship itself. Whatever warning we had of a hypothetical assault would be very short. It would be signaled to all of us by a siren on the intercommunications system, and after that it would be battle stations, naval units to their ships and all others to such ground defenses as we had. But modern warfare is all to the offense. There is no way of stopping an attack from space except by meeting it and annihilating it before it gets to its destination. The rebels were counting on that fact to aid them when they struck, but it would, of course, work against them if their enemy should happen to hit first. Everyone was understandably nervous about the chance of our being discovered and assailed. Working a little at a time, I had put a special switch in the general alarm circuit. It showed up merely as one of many on a sector call board near my room; no one was likely to notice it. And my quarters were not those originally given me. I had moved to a smaller place farther from Barbara, ostensibly to be near my work at the shipyards, actually to be near the base's ultrabeam shack. Now it was time to act. I needed an excuse for not going to the gun turret where I was assigned. That involved faking a serious fever, but like all Intelligence men, I had been trained to full psychosomatic integration. The same neural forces that in hysteria produce paralysis, stigmata, and other real symptoms were under my conscious control. I thought myself sick. By morning I was half delirious and my veins were on fire. The surgeon general came to see me. "What the hell's the trouble?" he wondered. "This place is supposed to be sterile." "Maybe it's too damn sterile," I murmured with a perfectly genuine weakness. Then, fighting the light-headedness that hummed and buzzed in me: "_Tsitbu_ fever, Doc. I'm sure that's what it is." "Can't say I've ever heard of it." "You'll find it in your medical books." He would, too. "It's found on the planet Sirius V, where I once visited. Filter-passing virus, transmitted by airborne spores. Not contagious here. In humans it becomes chronic; no ill effects except a few days' fever like this every few years. Now go 'way and lemme die in peace." I closed my eyes on the distorted and unreal world of sickness.