'Hold it a minute!' Pauncho said.
They stopped. Seemingly from faraway came voices. But if they could be heard there, they would not be too far distant.
'They've probably seen our blood by now and are trailing us,' Caliban said. 'If only we could ambush some of them. They have guns and they may have first- aid kits; and they must have blacklight projectors and just possibly underwater breathing plugs.'
'Wouldn't Iwaldi know that and take care of that possibility?' Barney said.
'Yes. But we know the way, and we know what kind of traps Iwaldi has sprung,' Doc said. He did not mention the probability that Iwaldi had closed off all exits.
They went on, splashing. The water around their feet was tinged with red. Doc suddenly stopped at a corner where the tunnel ran into another. He bent over, peering, and said, ‘There's Cobbs' marks.'
They went down the tunnel, turned right, walked ten yards, turned left, and were confronted with a stairway the top of which was a foot under water. The marking at the corner of the wall was still visible through the water. It indicated that the way led down the steps.
There are three levels to go before we get to the exit,' Pauncho said.
Doc help up his hand for silence. A splashing was coming from far around the corner.
'We can't make it unless we have breathing plugs,' he said. 'And there's only one source for them. Here's what we'll do.'
Barney walked back to the far end of the tunnel and looked around the corner. Within a minute, he jerked his head back, turned, and waved at them. Then he trotted toward them. By the time he reached them, the water was up to his calves.
‘Ten of them,' he said. 'Automatic rifles and pistols. Blacklight projectors on their caps but they're not using their goggles. It's impossible to tell if they have breathing plugs.'
He added, 'And I smelled smoke. The napalm can't be too far behind.'
The invaders would not know about Cobb's markings, of course, so they would go on down the tunnel. They would be looking for a way out which would not force them to submerge. Doc had looked down the corridor and seen the hole in the middle of the floor. There was a shaft there which the ancient kobolds had made apparently for quick exits, as if they were human-sized mouse holes. This was the pivotal point of his attack.
He waded down the steps until the water was up to his waist and then he swam along the wall. The bulbs along the wall guided his path and enabled Barney to see him. When Doc was opposite the shaft, Barney signalled him. Doc dived, was visible in the lights until he went under the ceiling, and then popped up in the well in the middle of the tunnel. Pauncho went down the tunnel to the end and around the corner. Doc Caliban submerged and came back up in the other tunnel. He hung on to a light bulb while Barney sat on the steps with his ear placed near the juncture of wall and steps.
In a few seconds, Barney heard the loud splashing of the ten men. He waited until he judged that the lead man was just about to come opposite the stairway, and he slid off the stairs into the water and down alongside it. When he reached the bottom, he flattened himself against the side. Now all he could do was to hold his breath and hope that the leader would take time out for a glance into this tunnel before deciding to go on. If anybody leaned out and looked down the side of the steps, he would see Barney in the light of the closest bulb.
Doc had submerged also and swam the few feet necessary to get to the bottom of the well. Here he placed one hand on the ceiling next to the lip of the shaft and waited. He hoped the bleeding would slow down enough so the men would not notice that the waters were reddened. And he hoped the enemy would not loiter in that corridor. Normally, he could hold his breath for fifteen minutes if he hyperventilated for thirty minutes (the official world's record was 13 minutes, 42.5 seconds). But he had no time to hyperventilate and he was too weakened to hold his breath for much more than two minutes.
Fortunately the lighting was such that the men above cast their shadows over the well as they passed on its right. He counted ten and swam up with all his strength as the last shadow passed. He came out of the shaft without making any noise and pulled himself with one fluid motion onto the floor. The water was then a foot and a half high and the splashing made by the men drowned out any noise he made. He stood up and quickly approached the rear man whose eyes were straight ahead. He hit him in the back of the neck and caught the rifle as it fell. By then Barney was coming down the hall behind him, and he threw the rifle to him and then waded up and knocked out the next man.
He did not fire at once. He waited until the lead man got to the corner and he saw Pauncho's long thick arm reach out and grab the rifle and pluck it out of the man's hands. The stock of the rifle, reversed, caught the man under the chin, and he went down.
Doc called, 'Freeze!'
Pauncho stuck the barrel of the rifle around the corner and said, 'Don't move!'
The shock held the others in its grip long enough for them to see that they could only die if they tried to resist. They dropped their rifles into the water and put their hands, slowly, behind their necks.
Pauncho stepped out from the corner and said, 'You there!' indicating the man now at the head of the line. 'Drop your belt! Slowly! Then get the nose plugs of this guy!' He tilted his head to indicate the man he had knocked out. This one lay face down on the floor, covered entirely by the water. He had drowned, but he would have drowned in any event, since Pauncho was taking his breathers away from him. Three men had to be sacrificed. The survivors could consider themselves lucky that they had had the right positions in the line.
While Barney kept the rifle on the men, Doc felt through the pockets of the two men he had knocked out, who had also drowned. He came up with the plugs and handed two to Barney. The enemy were dropping their belts, which held knives and pistols and bullets, into the water. At Pauncho's command, they completely undressed.
One of the men carried a medical kit. Doc opened this and popped hemenerogen tablets into his mouth. Barney swallowed some, and one man carried some to Pauncho and then returned to his place in line. There were also ointments and some pseudoprotein dressings which Doc and Pauncho applied while Barney held his rifle on the prisoners. Both immediately felt better though far from being in one hundred percent good health.
While they were doing this, the water had risen three inches.
Doc Caliban explained to the prisoners what they would have to do if they wanted to survive. They did not like the idea, but a gush of smoke and a steady rise in the air temperature convinced them that they had no other choice.
Caliban removed the ammunition from the rifles and gave one to each man. They went back to the entrance-way and down the steps, shivering at the coldness of the water. The only clothing they wore were the black-light projectors and the goggles around their necks in case they came to dark tunnels. Their captors wore only belts with sheathed knives, and they carried rifles.
The three stayed behind the seven men, who moved through the water, swimming with one hand while they held the rifles against their bellies and at right angles to the longitudinal axis of their bodies. This made for slow swimming, but it also made for safe swimming, as they found out. On the last level down, a section of the wall slid out, displacing much water as the first four men went by. Three of the rifles caught as they were supposed to do; the fourth was dropped as the man swam away in a panic. The movement of the block had been impeded by the water and the displacement of the water had warned the defenders.