Vorna honed her concentration, flowing yet deeper into the bloodstream. Now she could feel the vital elements within the flow. Still she could detect no sign of disease. The liver began to fail, and Vorna strengthened it. Then the kidneys weakened once more, and she boosted them with fresh energy. She was tiring now, and still there was no clue to what was killing the child.

Vorna withdrew from the boy. His colour was a little better, his breathing easier. Gwen returned to the room, carrying mugs of tisane. Vorna saw her spirit soar as she looked down upon her son.

'Do not get your hopes up, Gwen,' said Vorna sternly. 'I cannot yet identify the source of his sickness. Sit quietly by and do not in any circumstances speak to me unless I ask you to. You understand?'

'Yes,' said Gwen meekly.

Vorna gazed at the child's waxen skin. Think, she told herself. Whatever is causing this is powerful indeed, and yet why had he not succumbed earlier? If it was a sickness, surely he should have caught it from Ruathain far sooner than this. As should the mother, and any others with close contact to the boy. Therefore it was not like the plague or any contact-borne sickness. Yet there had to be a link.

The boy's heart stopped again. Vorna's spirit eased once more through the skin, sending a bolt of energy to the stricken organ. Orrin's body convulsed, then the heart began again. Vorna withdrew and turned to Gwen. 'You say the sickness began only today? No indications before this?'

'None. He has always been healthy. Aren't you going to do something?'

'I am doing something, Gwen. Stay calm.'

Vorna returned her attention to the child. The surface of his skin was hot, his body battling to bring down the fever temperature. Vorna flowed deeper, once more repairing the liver and kidneys. She had never come across anything like this before. It was as if the disease was continually invading the child.

For another hour she fought on, but she was now tiring rapidly. Pulling back from his body she slumped in her chair and sipped her cold tisane. Whatever had killed Ruathain was now destroying his brother. Again she turned to Gwen. 'How long was Ruathain sick?'

'Almost a year now. At first he just felt weak, and had no appetite. He would sleep all the time. Then, as the months passed, he grew weaker and weaker. He rallied when Banouin tended him – but only for a while. Why has it struck Orrin so savagely? He looks now like my Ru at the end.'

'Orrin is younger. Perhaps that is the key. Perhaps a strapping lad can fight off this . . . this malady with more strength than a child. But there is a link here that we must find. Otherwise he will not last the night.'