Thought of the Druids drew his mind sharply back to the present. The dark outline of the island loomed closer against the fainter shadow of the night sky, and it seemed that the island floated not on water but on the ethereal mist rising from the lake. It certainly seemed sinister enough, Cato reflected. The dread in Prasutagus’s expression whenever he had talked of this place over the last two days suggested there was worse to come. But what, in this world, could be terrible enough to frighten the huge warrior? Cato’s imagination went to work to provide an answer and he felt a chill finger of horror trace its way up his spine. He cursed himself for this superstitious self-indulgence but as they silently glided through the dark waters, his heightened senses continued to magnify every sound and shift of shadow. It took a great effort of will to prevent his imagination conjuring up the demons lurking invisibly on the shores of the sacred Druid isle.

They were now close enough to the shore for the outermost boughs of its ancient trees to overhang them. Looking up through the twisted black tendrils of the outermost branches, Cato gazed up at the stars, cold and unblinking above the mist. Then he turned and gazed back across the gloomy water to where Boudica waited for them. He wondered if he would ever see her again, and found himself desperately wanting to see her face once more. The unbidden longing was quite shocking and Cato wondered at this instance of self-revelation.

He started as Macro grasped his arm, flinching backwards and splashing the water.

‘Keep still!’ hissed Macro. ‘Want to let every bloody Druid in Britain know we’re here?’

‘Sorry.’

Macro turned back to Prasutagus, who was muttering something under his breath. The whispered words flowed with a cadence and rhythm that was not like everyday speech and Macro realised this must be some kind of charm. When the Briton paused, Macro gently touched his shoulder.

‘Let’s go, mate.’

Prasutagus stared at him for a moment, silent and still as a stone, before nodding gravely and then creeping forward once again. This section of the shore was lined with wicker reinforced with timber piles and stood two feet above the icy water. They heaved themselves across it as quietly as possible, but inevitably water dripped and splashed, sounding dangerously loud. Prasutagus glanced anxiously into the shadows beneath the trees, certain that they must be heard. But nothing stirred, no breath of air even lifted the lightest of the dark branches. All three were still for a while, squatting and listening. Cato shivered as he waited for Prasutagus to wave them forward. They made their way along the shore for a short distance, until they came to a track leading into the dark trees. It seemed to Cato that the night suddenly became colder, as if a breeze was blowing, but the air about him was perfectly still.