"What do we do now?"
"We will eat a little and then rest.
We have got to try and sleep. We will need to keep our strength up." Craig realized it was an evasion even as he said it, but surprise ingly, he did sleep.
When he awoke, Sally-Anne was cuddled against his chest, and she coughed in her sleep. It was a rough phlegmy sound. The cold and damp was affecting them all, but the sleep had refreshed Craig and given him strength.
Although his own throat and chest were still painful from the gas, they seemed to have eased a little and he felt more cheerful. He lay back against the rock wall, careful not to disturb Sally'Arme. Tungata was snoring across the fire, but then he grunted and rolled over and was silent.
The only sound in the cavern now was the drip of water from the seepages in the roof, and then, very faintly, another sound, a whispering, so low that it might have been merely the echoes of silence in his own ears. Craig lay and concentrated his hearing. The sound annoyed him, niggled at his mind as heried to place it.
"Of course," he recdknized it, "bats!" He remembered hearing it more clearly when he had first reached the platform. He lay and thought about it for a while and then gently eased Sally-Anne's head off his shoulder. She made a soft gurgling in her throat, rolled over and subsided again.
Craig took one of the lanterns, and went back into the tunnel that led to the platform and the shaft. He flashed the lantern only once or twice, conserving what was left in the batteries, and in darkness he stood on the platform with his back against the rock wall and listened with all his being.
There were long periods of silence, broken only by the musical pinging of water drips on rock, and then suddenly a soft chorus of squeaks that echoed down the chimney of the shaft, then silence again.
Craig flicked on the lantern, and the time was five o'clock. He was not certain if it was morning or evening, but if the bats were roosting up there, then it must still be daylight in the outside world.
He squatted down and waited an hour, at intervals checking the slow passage of time, and then there was a new outburst of faroff bat sounds, no longer the occasional sleepy squeaks, but an excited chorus, many thousands of the tiny rodents coming awake for the nocturnal hunt.
The chorus dwindled swiftly into silence, and Craig checked his watch again. Six-thirty, five He could imagine somewhere up above the airborne horde pouring out of the mouth of a cave into the darkening evening sky, like smoke from a chimney pot.
He moved carefully to the edge of the platform, steadied himself on the side wall and leaned out over the drop very cautiously, keeping a handhold. He twisted his head to look up the shaft, holding the lantern out to the full stretch of his arm. The feeble yellow light seemed only to emphasize the blackness above him.
The shaft was semicircular in plan, about ten feet across to the far wall. He gave up on trying to penetrate the upper darkness and concentrated on studying the rock of the shaft wall opposite him, prodigally using up the battery of the lamp" It was smooth as glass, honed by the water that had bored it open. No hold or niche, nothing, except- He strained out over the drop for an extra inch. There was a darker mark on the rock just at the very edge of his vision, directly opposite him, and well above the level of his head.
Was it a stratum of colour, or was it a crack? He could not be sure, and the light was fading. It could even be a trick of shadow and light.
"Pupho," Tungata's voice spoke behind him and he pulled back. "What is it?"
"I think this is the only way open to the surface." Craig switched off the lantern to save it.
"Up that chimney?" Tungata's voice was incredulous in the darkness. "Nobody could get up there."
"The bats they are roosting up there somewhere."
"Bats have wings," Tungata reminded him, and then after a while, "How high up there?" don't know, but I think there may be a crack or a ledge on the other side. Shine the other lamp, its battery is stronger." They both leaned out and stared across.
"What do you think?"
"There is something there, I think."
"If I could get across to it!" Craig switched off again.
"How?"
"I don't know, let me think." They sat with their backs against the wall, their shoulders just touching.
After a while Tungata murmured, "Craig, if we ever get out of here the diamonds. You will be entitled to a share "Do shut up, Sam. I'm thinking." Then, after many minutes, "Sam, the poles, the longest pole in the ladder do you think it would reach across to the other side?" They built a second fire on the ledge, and it lit the shaft with an uncertain wavering light. Once again Craig went down the rope, onto the remains of the timber ladder, and this time he examined each pole in the structure. Most of them had been axed to shorter lengths, probably to make it easier to carry them down through the tunnels and passages from the surface, but the side frames were in longer pieces. The longest of these was not much thicker than Craig's wrist, but the bark was the peculiar pale colour that gave it the African name of "the elephant tusk tree'.
Its common English name was lead wood one of the toughest, most re silent woods of the veld.
Moving along it, measuring it with the span of his arms, Craig reckoned this pole was almost sixteen feet long. He secured the end of the rope to the upper end of the pole, shouting up to the platform to explain what he was doing, and then he used his clasp-knife from the kit to cut the bark rope holding the pole into the ladder work There was the terrifying moment when the pole finally broke free and hung on the rope, swinging likea pendulum, and the entire structure, deprived of its kingpins began to break up and slide down the shaft.