Gaille's head lolled against Knox's shoulder as he picked his way carefully over treacherous submerged rubble, Lily out in front, her torch playing shadow-theatre on the walls. The corridor sloped gently upwards so that soon the water was only calf-deep, making progress easier, but forcing Knox to concentrate harder on his footing. Maybe that was why Lily noticed the murals first. 'What are they?' she asked, illuminating the gypsum-covered wall with her torch.
He went closer to examine them. Faded paintings of stunted trees. Row upon row of them, column after column; the motif endlessly repeated, like ancient wallpaper. And the same on the right-hand wall, too.
'Well?' asked Lily.
Knox shook his head. He'd never seen anything like it before. At least, trees and other vegetation were common enough in Ancient Egyptian art, but only as part of greater scenes, typically filled with people, livestock, water, birds. Never just one tree endlessly repeated like this. Or was it just one tree? Those to his right looked distinctly different from those to his left. The Egyptians had been meticulous about such things. But this was scarcely the moment for detailed investigation. They continued on, emerged from the water altogether, were able to see that the passage wasn't sloped but rather was cut with long, shallow steps that had been turned into a gentle ramp by the thick covering of sand, rubble and dirt.
Something glinted on the floor where Lily had stepped. He swept it with his foot to reveal a metallic strip running down the centre of the passage. 'Over here,' he said. 'Let's have some light.'
Lily shone down her torch. 'Jesus!' she muttered. 'Is that… gold?'
'Looks like it.'
'What is this place?'
A memory sprang then to Knox's mind: Kostas describing the link between Harpocrates and Akhenaten, the Luxor Temple on which were depicted wise men coming from the east to celebrate his birth, and the gifts they brought with them. These trees on the walls, not trees at all, but shrubs. Specifically, frankincense and myrrh. And suddenly it all started to make a kind of sense to him, this Exodus quest he'd so unwittingly started out on.
'What is it?' asked Lily, reading it on his face. 'Do you know where we are, or something?'
'I think I do,' said Knox slowly. 'I think we're in the Cave of Treasures.'