“To destroy Grumbler? You’re out of your heady Sawyer. If Grumbler’s knocked out, the whole area around the excavations gets blown sky high… to keep them out of enemy hands. You know that.”
“You expect me to care?”
“Stop screaming, Sawyer. Those excavations are the most valuable property on the Moon. We can’t afford to lose them. That’s why Grumbler was staked out. If they got blown to rubble, I’d be court-martialed before the debris quit falling. ”
The response was snarling and sobbing. “Eight hours oxygen. Eight hours, you hear? You stupid, merciless — ”
The enemy to the south stopped moving at a distance of twenty-eight kilometers from Grumbler’s hill—only three thousand meters beyond magnapult range.
A moment of berserk hatred. It lumbered to-and-fro in a frustrated pattern that was like a monstrous dance, crushing small rocks beneath its treads, showering dust into the valley. Once it charged down toward the pain perimeter, and turned back only after the agony became unbearable. It stopped again on the hill, feeling the weariness of lowered energy supplies in the storage units.
It paused to analyze. It derived a plan.
Gunning its engines, it wheeled slowly around on the hilltop, and glided down the northern slope at a stately pace. It sped northward for half a mile across the flatland, then slowed to a crawl and maneuvered its massive bulk into a fissure, where it had cached an emergency store of energy. The battery-trailer had been freshly charged before the previous sundown. It backed into feeding position and attached the supply cables without hitching itself to the trailer.
It listened occasionally to the enemy while it drank hungrily from the energy-store, but the enemy remained motionless. It would need every erg of available energy in order to accomplish its plan. It drained the cache. Tomorrow, when the enemy was gone, it would drag the trailer back to the main feeders for recharging, when the sun rose to drive the generators once again. It kept several caches of energy at strategic positions throughout its domain, that it might never be driven into starved inability to act during the long lunar night. It kept its own house in order, dragging the trailers back to be recharged at regular intervals.
“I don’t know what I can do for you, Sawyer,” came the noise of the enemy. “We don’t dare destroy Grumbler, and there’s not another autocyber crew on the Moon. I’ll have to call Terra for replacements. I can’t send men into zone Red-Red if Grumbler’s running berserk. It’d be murder.”