Will's mistakes were beginning to compound. As they did, the danger grew progressively greater.
The first mistake, and the one that led to all the others, he was still unaware of. That was the fact that for the greater part of the first day, misled by his inaccurate Northseeker, he had been travelling far to the east of his intended course. When the influence of the iron deposits in the Red Hills was finally behind him, and his Northseeker returned to a true heading, the damage was already done. With every kilometre, he had diverged farther from the course that he thought he was taking. Now he was travelling parallel to it, but kilometres from where he thought he was.
His second mistake was to convince himself that he had seen the landmarks he was seeking. Admittedly, he had seen no flat-topped hill. But he told himself that he must have passed it without recognising it, rationalising to himself the fact that its shape had undoubtedly changed over the years from the distinctive profile that Selethen's chart indicated.
The low bank that he had seen late the previous afternoon bore no real resemblance to a line of cliffs. But, needing to believe that he had seen the cliffs, he convinced himself that he really had. He had seen no caves, and the chart showed that the cliffs had been honeycombed with them. Instead, he reassured himself that the caves were invisible because they had been shrouded in late afternoon shadow.
Now, to settle the question once and for all, he should see a balancing rock formation some time in the next few hours – a formation where a large rock balanced precariously on top of a smaller. At least, he told himself with a growing sense of foreboding, a feature like that would be unmistakable.
Unless the big rock had fallen off the smaller one overnight, he added grimly.
He needed to see that formation because his water supply was becoming alarmingly depleted. The first water-skin was empty. The second was less than half full. He had tried to ration himself severely but the heat simply drained energy from him so that he had to drink or fall senseless to the ground.
He consoled himself with the thought that, once he saw the balancing rocks and fixed his position, the water problem would be solved. A few kilometres from those rocks, a soak was marked on the chart – a small depression in a dried-up river-bed where water seeped slowly to the surface. Once there, all he would have to do was dig down a metre or so and wait while water filled the hole. It might be muddy and unpleasant, he knew. But it would be drinkable. And with his waterskins refilled and his location established once and for all, he would be able to strike out for one of the wells.
Sometime in the next few hours, he simply had to see the balancing rock formation or he was lost – figuratively as well as literally. As a result, he had to trust his map and his Northseeker and continue to believe that sooner or later, he would see those rocks. He simply had no alternative course of action.
It was this growing fatalism that led to his final, and most serious, mistake. Obsessed with the need to find the balancing rocks, and validate his course of action so far, he continued to ride through the hottest hours of the day.
Experienced desert travellers like Selethen didn't do this, he knew. But again, he rationalised. Selethen could navigate by the stars and didn't need daylight to sight landmarks and reference points. That meant he could afford the time spent resting in the middle of the day. But Will had an urgent need to find that water soak and surely a few hours of heat wouldn't do too much harm.
So he rode on, the heat battering down on him like a physical force as the sun rose higher in the sky. The air itself was superheated so that it almost scorched his throat and lungs when he breathed it in. It seemed that the all-pervading heat had sucked the very oxygen out of the air so that he gasped and panted for breath.
As well as the heat, the glare was a constant torture, forcing him to look into the shimmering distance with his eyes screwed almost shut.
Beneath him, Arrow plodded on, head down, feet dragging. Will was alarmed by the horse's rapid deterioration, having no idea that his own condition was even worse.
'Time for some water, boy,' he said. His voice was little more than a croak, forcing itself out through his dry throat and mouth.
He swung down from the saddle, his body stiff and awkward. He staggered a few paces as he touched the ground, having to steady himself against the horse's flank. Arrow stood unmoving, head drooped almost to the ground. Then he shifted his weight to his left side, seeming to favour his right front hoof. Already, after only a few seconds standing, Will could feel the blazing heat of the ground burning up through the soles of his boots. For Arrow's unprotected hooves, it must be torture, he thought.
'I'll take care of that in a minute,' he told the horse. 'First we'll drink.'
He fumbled with the ties attaching the folding leather bucket behind the saddle and dropped the bucket onto the ground. He laughed briefly.
'Just as well it wasn't full,' he told Arrow. The horse didn't respond. Setting the bucket down carefully, making sure he had placed it on a flat surface, Will took the remaining waterskin and unstoppered it carefully. He was painfully aware of how light it was now. As he poured carefully, Arrow's head turned towards the sound. The horse made a low grumbling noise in his throat.
'Hold your horses,' he said. Then he laughed again at the idea of telling his horse to hold his horses.
'Not that you're my horse, really,' he continued. 'But you're a good horse for all that.'
A part of his mind was a little concerned by the fact that he was laughing and joking with his horse. He had the strange sensation that he was standing to one side, watching himself and Arrow, and he frowned at this irrational behaviour. He shook the ridiculous notion away and held the bucket for Arrow to drink.
As ever, he felt his own mouth and throat working as he watched the horse drink. But, whereas the previous day his mouth had been thick and gummy feeling, today it was dry and swollen, all excess moisture gone from it.
Arrow finished, his big tongue futilely searching the seams of the bucket where a few last drops might be hidden. Will had become accustomed to the horse's almost philosophical acceptance of the amount of water he was given. This time, however, Arrow raised his head and nosed insistently around the waterskin slung over Will's shoulders. It was another indication of how their condition was worsening. The horse's training was overcome by its need for water.
Will pushed the questing muzzle away. 'Sorry, boy,' he said, almost incoherently. 'Later.'
He took two small sips himself, holding each one in his mouth, making it last, before letting it trickle slowly down his throat. Then, reluctantly, he re-stoppered the water skin and laid it in the scant shade of a thornbush.
He raised Arrow's left front hoof to examine it. The horse grumbled and shifted awkwardly. There was no visible injury but when he laid his palm on the soft centre of the hoof, he could feel the heat there. The desert ground was burning Arrow's unprotected feet. Will appreciated it even more now that he was standing. The heat was all around them. It beat down from the sun, hit the desert floor and struck upwards again. At least when he was riding Arrow he had a little relief from it.
He untied his blanket from behind the saddle and cut it into squares and strips. Then he wrapped the little horse's hoofs with pieces of the blanket, padding the underside with several folded layers, and tying the whole thing in place with thin strips. He'd be cold when night fell, he knew. But he'd be in a worse spot if his horse became lame.
Arrow seemed to be standing more comfortably, no longer leaning to his right side. Will took his bridle and led him a few paces, walking backwards to watch his gait. The horse didn't seem to be favouring either side now, he saw with some relief.
Retrieving the water skin, Will slung it over his shoulder and prepared to mount.
Then he stopped and patted Arrow gently on the neck. 'I'll walk for a while,' he said. 'You've been doing all the work.'
He took out his Northseeker and checked his course, seeking a bearing point. There was a vertical pillar of rock and salt in the middle distance, the crystals reflecting painfully in the sun. But that made it easier to keep track of and he set off for it.
Arrow trudged after him, head down, his hooves now making a strangely muffled sound on the desert sand.
A further mistake. Burdened by the inescapable heat, Will took off his cloak and draped it over Arrow's saddle. He rolled up his shirt sleeves and, for a few moments, he felt a little cooler. But it was an illusion. The cloak, like the flowing garments of the Arridi, helped the body retain moisture. Without it, and exposed to the sun, he began to dehydrate even more rapidly than before.
In addition, his bare arms began to redden, then to burn, then to blister. But by the time he might have realised his mistake, Will was no longer capable of intelligent thought. His system was shutting down. His thinking was becoming erratic and unreliable. And still he hadn't seen that elusive formation of balancing rocks. They were an obsession with him now. They had to be here somewhere and he had to see them. Soon, he told himself. Soon. He could no longer appreciate the fact that he had hoped to see them after an hour or two travelling. He had now been riding and walking for over four hours with no sign of them.
Some time after noon he turned to face Arrow.
'Have you seen them?' he asked. – Arrow looked at him disinterestedly. Will frowned.
'Not talking, eh?' he said. 'Maybe you're a little hoarse.'
He cackled briefly at his own wit and for a moment, he had that uncomfortable sensation again – that he was standing to one side watching himself and the horse stumble across the desert. He became aware of the water skin slung across his shoulders.
'Need a drink,' he said to Arrow. Irrationally, he told himself that the water skin was weighing him down. If he drank some more, it would be lighter. And he would move more easily, he decided.
He drank deeply, then became aware of Arrow's accusing eyes on him. Guiltily, he re-stoppered the skin and set off again.
It was then that the realisation hit him. Selethen had given him a false map. There were no cliffs pockmarked with caves. There was no flat-topped hill. Of course, the Wakir wouldn't hand him such a valuable strategic document! Why hadn't he seen it before? The swine had given him a false chart and sent him out into the desert to die.
'He tricked us,' he told the horse. 'But I'll show him. We must be close to that soak by now. We'll find it and I'll go back and ram his map down his lying throat.'.
He frowned. If the map were false, there would be no water soak just a few kilometres away. He hesitated. Yet there must be a soak. There had to be! Then his thoughts cleared.
'Of course!' he told Arrow. 'He couldn't falsify the whole thing! Some of it must be true! Otherwise we'd have seen right through it straight away! That's real cunning for you.'
That problem solved, he decided that he could afford to give Arrow some more of the precious water. But the effort of untying and assembling the folding bucket seemed too much. Instead, he let the water trickle into his cupped hand, laughing softly as Arrow's big tongue licked at it. Some of it spilled, of course, soaking instantly into the baking sand. But it didn't matter. There would be plenty more at the soak.
'Plenty more at the soak,' he told the horse.
He replaced the stopper and stood swaying beside Arrow. The problem was, he thought, without another drink, he might not have the strength to reach the soak. Then he would die, all because he refused to drink the water he already had. That would be foolish. Halt wouldn't approve of that, he thought. Coming to a decision, he removed the stopper and drained the last of the water. Then he set off, staggering, beckoning Arrow to follow.
'Come on, boy,' he said, the words sounding like the harsh croaking of a crow.
He fell. The ground burnt his hands as he tried to break the fall and he didn't have the strength to rise. He lifted his head and then, wonder of wonders, he saw it!
The balancing rock, just as Selethen had drawn it! It was only a few hundred metres away and he wondered how he could have missed seeing it before this. And just beyond that would be the soak, and all the water he could drink.
He couldn't stand. But he could easily crawl that far. He began to crawl towards those beautiful balancing rocks.
'How do they do it? Why don't they fall over?' he marvelled. Then he added, with a chuckle, 'Good old Selethen! What a map!' He looked behind him. Arrow stood, feet wide apart, head hanging, not following.
'Come on, Arrow!' he called. 'Plenty of water this way! Come on! Just to the rocks! The wonderful, wonderful balancing rocks! How do they do it? Step right up and see!'
He didn't realise that his words were an indecipherable croak. The water he'd just drunk hadn't been enough to compensate for the amount he had lost in the past five hours.
He continued to crawl, dragging himself over the rough, stony ground – the stones cutting his hands and the heat burning them. He left bloody handprints behind him – handprints that quickly dried to a dull brown in the insufferable heat. Arrow watched him going with dispirited eyes. But the horse made no move to follow him. There was no reason to.
There were no balancing rocks and Will was crawling in a giant circle.