'So make sure you do as you're told.' Harsnet took a shilling from his pocket and passed it to Wheelows. 'All right, you can go.' The old man bowed quickly to us, cast a last frightened look over at the marshes, then clambered grunting through the mud to the path. He walked rapidly off towards Westminster. Harsnet watched him go. 'I didn't like locking him up,' he said. 'But we had to scare him to keep him silent.' I nodded, then stared into the tidal pool. 'It's just like Roger. The doctor was lured to a meeting with someone, drugged, then carried out here. His throat was slit and he was dumped in the pool. People walk along this path every day, more when the river was frozen and the wherries weren't running. If the old man hadn't come on the body early it would have made another—' I hesitated — 'spectacle.' Harsnet looked down the path. 'But how could he drag the body out here? Dr Gurney wouldn't have met anyone on this path at night, surely.' I nodded at the river. 'People were walking across the ice then.
