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.