One of the young springtails quietly shifted position. Grabbing the tunneler's fur with its forelimbs, it began to gnaw on the cuff of Afriel's pants. Afriel kicked it soundly, and it jerked back, retracting its eyestalks.

When he looked up again, he saw that they had entered a second chamber, much larger than the first. The walls around, overhead, and below were buried under an explosive profusion of fungus. The most common types were swollen barrellike domes, multibranched massed thickets, and spaghettilike tangled extrusions that moved very slightly in the faint and odorous breeze. Some of the barrels were surrounded by dim mists of exhaled spores.

"You see those caked-up piles beneath the fungus, its growth medium?" Mirny said.

"Yes."

"I'm not sure whether it is a plant form or just some kind of complex biochemical sludge," she said. "The point is that it grows in sunlight, on the outside of the asteroid. A food source that grows in naked space! Imagine what that would be worth, back in the Rings."

"There aren't words for its value," Afriel said.

"It's inedible by itself," she said. "I tried to eat a very small piece of it once. It was like trying to eat plastic."

"Have you eaten well, generally speaking?"

"Yes. Our biochemistry is quite similar to the Swarm's. The fungus itself is perfectly edible. The regurgitate is more nourishing, though. Internal fermentation in the worker hindgut adds to its nutritional value."

Afriel stared. "You grow used to it," Mirny said. "Later I'll teach you how to solicit food from the workers. It's a simple matter of reflex tapping -- it's not controlled by pheromones, like most of their behavior." She brushed a long lock of clumped and dirty hair from the side of her face. "I hope the pheromonal samples I sent back were worth the cost of transportation."