'I'll be right behind you,' Malcolm said. 'Let me know if you're in trouble.'

The healer had personal knowledge of Horace's courage and he knew this fear of dark, confined spaces had nothing to do with physical bravery. It was something locked deep in Horace's mind – perhaps some incident in early childhood that he had long forgotten. Knowing this, he recognised the real courage that Horace was showing in overcoming his fear.

'I'll be fine,' the young warrior said, his face set in tight lines. Then he relaxed and grinned ruefully. 'Well, maybe not fine,' he admitted. 'But I'll manage.'

Holding his sword in one hand, he reached into his jacket for the canvas packet, then ducked down and shuffled forward into the tunnel.

After the brief period in the dim light of the cavern, the darkness of the tunnel seemed overwhelming once more. He reached up with his scabbarded sword, tracing the roof line above him. Then, as it receded out of reach, he stood slowly erect. Once again, he felt the terrifying sensation of blindness, the feeling that his world had been reduced to his own personal space, with nothing beyond it. The fear that his eyes no longer functioned. His heart began thumping more rapidly once again and he flipped back the cover on the luminous moss, seeing that wonderful little glow of light nestled in the palm of his hand. Behind him, he heard Malcolm shuffling along the tunnel.

Calmed by the little light source, Horace continued down the tunnel, moving with greater assurance now that the darkness wasn't total. He glanced up several times but the dim glow from the moss wasn't sufficient to reach the ceiling high above him. It was swallowed by the blackness. Rounding another twist in the tunnel, be became aware of a dim grey light ahead. Quickly, he covered the moss and made his way round one last corner of rock. Light seemed to pour in from the large cavern as he approached the end of the tunnel, where Will and Halt crouched, surveying the scene before them.

As Will had told them, the cavern was the size of a small cathedral, with a high, soaring roof that disappeared into the darkness above it. The far end of the high cavern was a blaze of light, where torches and candles were set in brackets. In the middle of the floor was a vast fireplace and the leaping flames from this cast shadows on the walls. Beyond the fire, and lit by what appeared to be scores of torches and candles, was an altar. It was the usual Outsiders' altar, built in gold and silver and decorated with precious gems. Yet if this one ran true to form, the gold was a thin veneer over wood and the silver and gems were fake. The real items would be safely stowed in Tennyson's packs.

Tennyson was in full flight, arms thrown wide, as he delivered an impassioned appeal to the assembly.

'Alseiass loves you!' he intoned. 'Alseiass wants to bring light and joy and happiness into your lives.'

'Praise Alseiass!' the congregation cried.

'You say the words!' Tennyson told them. 'But are your hearts sincere? For Alseiass only hears prayers from those who believe. Do you truly believe?'

'Yes!' the crowd replied.

Malcolm, his mouth close to Horace's ear, whispered, 'More to the point, do people really fall for this claptrap?'

Horace nodded. 'It never ceases to amaze me how gullible people can be.'

'There's danger in this land!' Tennyson continued. His voice now was full of foreboding. 'Danger and death and destruction. Who can save you from this danger?'

'Alseiass!' the crowd roared. Tennyson threw his head back now and looked up above them all, into the dark recesses of the ceiling of the cavern.

'Show us a sign!' he asked. 'Show us a sign, Golden Alseiass, god of light, that you hear the voices of these people before you!'

Malcolm eased forward a little to get a better view. He had spent years devising signs and manifestations in the depths of Grimsdell Wood – signs such as the one Tennyson was now asking for from his nonexistent god.

'This ought to be good,' he said, to no one in particular. Forty-nine Watching the fake preacher, Will noticed that, as he called for Alseiass to show a sign to the congregation, he glanced up at the jumble of rocks at the rear of the cavern – to a spot some twenty metres from the tunnel entrance where Will and the others crouched, concealed by the shadows.

Following the direction of his eyes now, Will saw a flicker of movement. Then there was the dull gleam of reflected light among the rocks and he made out the figure of a man there, hidden by the rocks from the worshippers below him.

He nudged Halt and pointed. As the older Ranger looked, a sudden ball of light seemed to sweep across the cavern's walls behind the altar where Tennyson was standing. There was a quick, collective gasp of surprise from those among the crowd who had noticed it, then a low buzz of excited conversation.

Then the flash of light travelled across the cavern again, this time in the opposite direction. As it reached a spot behind Tennyson, it described three flashing circles, then darted away again and disappeared. This time, alerted, more of the crowd saw it and there was a louder reaction. Tennyson let it die down a little, then raised his voice to speak over the excited muttering.

'Alseiass is the god of light and enlightenment!' he intoned. 'His light of mercy can be seen even in the darkest reaches of the earth. Do you see his light?'

Led by the white robes, the crowd took up the cry again. 'Praise to Alseiass! Praise the god of light!'

Halt beckoned Will closer and put his mouth near Will's ear to speak.

'He's got a helper up there with a mirror and a lantern,' he whispered. 'He's reflecting the lantern light on the walls.'

Will shook his head. 'Pretty basic trick,' he commented. But Halt shrugged.

'It's working. They can all "see the light".' He gestured to the pile of rocks where the man sheltered. 'Get up there and take care of him. Quietly.'

Will started to move away, then he hesitated and turned back. 'You want me to knock him out?'

Halt answered brusquely, wondering what the delay was about. 'No. I want you to invite him to dinner. Of course I want you to knock him out! Use your strikers.'

Will shrugged unhappily. 'I don't have them. Lend me yours?'

Halt couldn't believe his ears. He hissed angrily at Will, alarming Horace and Malcolm, who were sure he would be overheard.

'What do you mean you don't have them? They're part of your kit, for god's sake!' He couldn't believe that Will, a fully qualified Ranger, could be so undisciplined as to forget his strikers. Young people, he thought, shaking his head. What was the world coming to?

'I lost them,' Will said. He didn't add that he had lost them trying to capture Bacari alive, in order to save Halt's life. But he thought the older Ranger was being unduly harsh under the circumstances.

'You lost them? You lost them?' Halt repeated. 'D'you think we issue valuable equipment so you can just lose it?'

Will shook his head. 'No. But I…'

He didn't get any further. Horace interrupted their discussion, an incredulous look on his face.

'Will you two stop blithering on?' he demanded in a fierce whisper. 'Any minute now, someone will hear you and the fat will really be in the fire!'

Halt glared at him for a moment, then realised he was right. He thrust his hand into an inside pocket and retrieved one of his own strikers, which he shoved into Will's hand.

'Here. Take this! And don't lose it!'

On the altar, Tennyson was again exhorting the crowd to call upon Alseiass to show them another sign. There was a quick flash of light across the cave, followed by more cries of surprise and wonder. Watching carefully, Halt could see Will's dark shape climbing the rock pile, seeming to flow upwards across the jumble of boulders like a giant spider. He reached the spot where Tennyson's helper crouched with his lantern and mirror and paused, concealed from the man, a metre or so below his hiding place.