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. In the faint green light from the panel, the dead man crouched over the controls, one desiccated hand in a shriveled black glove clutching the control bar. He wore a GI weather suit and a white crash helmet, and one foot was twisted nearly backward, caught behind a jack lever. The leg had been broken before he died. He must have jammed the foot and twisted it so that the pain would hold off the sleep that had come at last. I leaned forward to see the face. The blackened and mummified features showed only the familiar anonymity of death, but the bushy reddish mustache was enough. "Hello, Mac," I said. "Sorry to keep you waiting; I got held up." I wedged myself into the co-pilot's seat, flipped the IR screen switch. The eight-inch panel glowed, showed me the enemy Bolo trampling through the fence three hundred yards away, then moving onto the ramp, dragging a length of rusty chain-link like a bridal train behind it. I put my hand on the control bar. "I'll take it now, Mac." I moved the bar, and the dead man's hand moved with it. "Okay, Mac," I said. "We'll do it together." I hit the switches,