The whoop! whoop! sounded again; the automated sentry Bolo was bearing down on me along the dancing lane of light. I grabbed at the plastic disk in my pocket as though holding it in my hand would somehow heighten its potency. I didn't know if the Lesser Troll was programmed to exempt me from destruction or not; and there was only one way to find out. It wasn't too late to turn around and run for it. Mallon might shoot--or he might not. I could convince him that he needed me, that together we could grab twice as much loot. And then, when he died-- I wasn't really considering it; it was the kind of thought that flashes through a man's mind like heat lightning when time slows in the instant of crisis. It was hard to be brave with broken bone ends grating, but what I had to do didn't take courage. I was a small, soft, human grub, stepped on but still moving, caught on the harsh plain of broken concrete between the clash of chrome-steel titans. But I knew which direction to take. The Lesser Troll rushed toward me in a roll of thunder and I went to meet it. * * * * * It stopped twenty yards from me, loomed massive as a cliff. Its heavy guns were dead. I knew. Without them it was no more dangerous than a farmer with a shotgun-- But against me a shotgun was enough. The slab under me trembled as if in anticipation. I squinted against the dull red IR beams that pivoted to hold me, waiting while the Troll considered. Then the guns elevated, pointed over my head like a benediction. The Bolo knew me. The guns traversed fractionally. I looked back toward the enemy line, saw the Great Troll coming up now, closing the gap, towering over its waiting escort like a planet among moons. And the guns of the Lesser Troll tracked it as it came--the empty guns, that for twenty years had held Mallon's scavengers at bay. The noise of engines was deafening now. The waiting line moved restlessly, pulverizing old concrete under churning treads. I didn't realize I was being fired on until I saw chips fly to my left, and heard the howl of richochets. It was time to move. I scrambled for the Bolo, snorted at the stink of hot oil and ozone, found the rusted handholds, and pulled myself up-- Bullets spanged off metal above me. Someone was trying for me with a power rifle. The broken arm hung at my side like a fence-post nailed to my shoulder, but I wasn't aware of the pain now. The hatch stood open half an inch. I grabbed the lever, strained; it swung wide. No lights came up to meet me. With the port cracked, they'd burned out long ago. I dropped down inside, wriggled through the narrow crawl space into the cockpit. It was smaller than the Mark III--and it was occupied.