thatâs why they left me and my father alone,â he said.
âThatâs correct,â Jürgen confirmed. âAs for this tribesman, he was smuggled into my institute several weeks before theplague hit, and I couldnât just abandon him. I didnât know if he was vulnerable to it too.â
âWe found a few of them dead in the jungle,â Will said.
âWerner thought that might be the case. Most vertebrates are susceptible. And the tribesmenâs physiology beneath those radically different epidermal layers is essentially the same as ours,â Jürgen said.
Elliott didnât seem convinced by this. âTheyâre human?â she asked. âThey donât look it.â
But Willâs mind was teeming with questions. âYou said that youâve been working with them? On what, exactly?â
âThe origins of their civilisation, the pyramids and the ruined city,â Jürgen replied. âProgress has been slow because communication with them is so rudimentary. You see those drawings on the table in front of him?â
Will and Elliott peered at the sheets of paper covered with pictures, similar to the pictograms carved on the exterior of the pyramids. âHieroglyphs?â Will asked.
âYes. Right from the start, we figured out that it was the best way to have any sort of meaningful exchange. You see, their language is very basic ⦠very limited.â
âMy dad was able to talk to them, but it didnât get us anywhere,â Will said, remembering the moment inside the pyramid.
âThatâs why this tribesman was at the institute, to make recordings. Weâd made the breakthrough that they communicate with each other using a whole other set of sounds which are barely audible to the human ear. Itâs â¦â
âItâs sort of high-pitched, like a buzzing noise,â Will cut in.
Jürgen nodded. âThatâs absolutely right.â
âAnd itâs even more difficult to hear because they move atthe same time ⦠they rustle,â Will said, then fell silent as he stared into the middle distance. He still felt bitterness towards the bushmen about the way they had treated him and Dr Burrows. âI picked up on it when they took us prisoner â just before they shopped us to the Styx.â
Jürgen turned to him. âYou know, the bushmen werenât ⦠arenât your enemy. They donât want to get involved in anyone elseâs conflicts. If they gave you up to the invaders, then it was because they believed they had to in order to protect their pyramid. Thatâs what they do. Thatâs all they do. They protect their pyramids. Endless generations have been the guardians ⦠the caretakers of something they donât seem to really understand.â Jürgen went to the observation window and held up his hand to the bushman, who held up one of his, although it resembled a bundle of twigs.
Will noticed that there were pieces of his skin scattered all around where he was sitting, like shredded leaves. âWhatâs that by his feet?â he asked.
âTheir epidermal layer â their thick skin â is an evolutionary adaptation. Itâs both camouflage and a screen against the sunâs harmful rays. But in here, away from the sunlight, the outermost layer isnât necessary, and some of it begins to dry up and slough off.â
Jürgen was obviously keen to show Will and Elliott to their rooms, and began to edge along the corridor, but Will was lost in his thoughts and oblivious to this. As Elliott took him by the arm to get him moving, he said, âIâd love to know what youâve learnt from these people.â
âIâd be very happy to take you through â¦â Jürgen said, tailing off as his son appeared. The boy thrust something into Willâs hand before running off again. It was a brightly-65coloured lollipop that rotated on