He rose and said, 'There's a pit under that firm-looking earth. I felt it give way as I put my foot on it. That's why it pays not to walk swiftly here.'

They circled it, Smhee testing each step before taking another. Masha thought that if they had to go this slowly, they would take all night before they got to the ridge. But then he led her to a rocky place, and she breathed easier. However, he said, 'They . could carve a pit in the stone and put a pivoting lid over it.'

She said, 'Why are we going this way? You said the entrances are on the north end.'

'I said that I only observed people entering on the north end. But I also observed something very interesting near here. I want to check it out. It may be nothing for us, but again...'

Still moving slowly but faster than on the earth, they came to a little pool. It was about ten feet in diameter, a dark sheet of water on which bubbles appeared and popped. Smhee crouched down and stared at its sinister-looking surface.

She started to whisper a question, but he said, 'Shh!'

Presently, something scuttled with a clatter across the solid rock from the shore. She jumped but uttered no exclamation. The thing looked like a spider in the dark, an enormous one, larger than the one they'd killed. It paid no attention to them or perhaps it wasn't at all aware of them. It leaped into the pool and disappeared. Smhee said, 'Let's get behind that boulder.'

When they were in back of it, she said, 'What's going on?'

'When I was spying, I saw some things going into and coming out of this hole. It was too far away to see what they were, though I suspected they were giant spiders or perhaps crabs.'

'So?'

His hand gripped her wrist.

'Wait!'

The minutes oozed by like snails. Mosquitoes hummed around them, birds across the river called, and once she heard, or thought she heard, that peculiar half grunt, half-squall. And once she started when something splashed in the river. A fish. She hoped that was all it was.

Smhee said softly, 'Ah!'

He pointed at the pool. She strained her eyes and then saw what looked like a swelling of the water in its centre. The mound moved towards the edge of the pool, and then it left the water. It clacked as it shot towards the river. Soon another thing came and then another, and all of a sudden at least twenty popped up and clattered across the rocks.

Smhee finally relieved her bursting question.

'They look like the bengil crab of Sharranpip. They live in that hole but they must catch fish in the river.'

'What is that to us?'

'I think the pool must be an entrance to a cave. Or caves. The crabs are not water-breathers.'

'Are they dangerous?'

'Only when in water. On land they'll either run or, if cornered, try to defend themselves. They aren't poisonous, but their claws are very powerful.'

He was silent for a moment, then said, 'The mage is using them to defend the entrance to a cave, I'm sure. An entrance which is also an exit. For him as well as for the crabs. That pool has to be one of his secret escape routes.'

Masha thought, 'Oh, no!' and she rolled her eyes. Was this fat fool really thinking about trying to get inside through the pool? SL. 'How could the mage get out this way if the crabs would attack Bum?'

'He would throw poisoned meat to them. He could do any number of things. What matters just now is that he wouldn't have bothered to bring their eggs along from Sharranpip unless he had a use for them. Nor would he have planted them here unless he needed them to guard this pool. Their flesh is poisonous to all living things except the ghoondah fish.'

He chuckled. 'But the mage has outsmarted himself. If I hadn't noticed the bengil, I would never have considered that pool as an entrance.'

While he had been whispering, another group had emerged and run for the river. He counted them, thirty in all.

'Now is the time to go in,' he said. 'They'll all be feeding. That crab you first saw was their scout. It found a good place for catching fish, determined that there wasn't any enemy around, and returned with the good news. In some ways, they're more ant than crab. Fortunately, their nests aren't as heavily populated as an anthole.'

He said, however, that they should wait a few minutes to make sure that all had left. 'By all, I mean all but a few. There are always a few who stay behind to guard the eggs.'

'Smhee, we'll drown!'

'If other people can get out through the pool, then we can get in.'

'You don't know for sure that the pool is an escape route!'

'What if the mage put the crabs there for some other reason?'

'What if? What if? I told you this would be very dangerous. But the rewards are worth the risk.'

She stiffened. That strange cry had come again. And it was definitely nearer.

'It may be hunting us,' Smhee said. 'It could have smelled the blood of the ape.'

'What is it?' she said, trying to keep her teeth from chattering.

'I don't know. We're downwind from it, butTt sounds as if it'll soon be here. Good! That will put some stiffening in our backbone, heat our livers. Let's go now!'

So, he was scared, too. Somehow, that made her feel a little better.

They stuck their legs down into the chilly water. They found no bottom. Then Smhee ran around to the inland side and bent down. He probed with his hand around the edge.

'The rock goes about a foot down, then curves inward,' he said. 'I'll wager that this was once a pothole of some sort. When Kemren came here, he carved out tunnels to the cave it led to and then somehow filled it with river water.' He stood up.

The low strange cry was definitely closer now. She thought she saw something huge in the darkness to the north, but it could be her imagination.

'Oh, Igil!' she said. 'I have to urinate!'

'Do it in the water. If it smells your urine on the land, it'll know a human's been here. And it might call others of its kind. Or make such an uproar the Raggah will come.'

He let himself down into the water and clung to the stony edge.

'Get in! It's cold but not as cold as death!' She let herself down to his side. She had to bite her lip to keep from gasping with shock.

He gave her a few hurried instructions and said, 'May Weda Krizhtawn smile upon us!' And he was gone.

10

She took a deep breath while she was considering getting out of the pool and running like a lizard chased by a fox to the river and swimming across it. But instead she dived, and as Smhee had told her to do, swam close to the ceiling of rock. She was blind here even with her eyes open, and, though she thought mostly about drowning, she had room to think about the crabs. | Presently, when her lungs were about to burst and her head I rang and the violent urge to get air was about to make her breathe, I her flailing hand was grasped by something. The next instant, she was pulled into air.

There was darkness all about. Her gaspings mingled with Smhee's.

He said, between the wheezings, 'There's plenty of air-space between the water and the ceiling. I dived down and came up as fast as I could out of the water, and I couldn't touch the rock above.'

After they'd recovered their wind, he said, 'You tread water while I go back. I want to see how far back this space goes.'

She didn't have to wait long. She heard his swimming - she hoped it was his and not something else - and she called out softly when he was near.

He stopped and said, 'There's plenty of air until just before the tunnel or cave reaches the pool. Then you have to dive under a downthrust ledge of rock. I didn't go back out, of course, not with that creature out there. But I'm sure my estimate of distance is right.'