‘Ruth!’ She turns and sees a man walking towards her. He is wearing jeans and a work-stained shirt and he treats the hill with disdain, hardly altering his long stride. He is tall and slim with curly dark hair greying at the temples. Ruth recognises him, as he obviously does her, from a talk he gave at her university several months ago. Dr Max Grey, from the University of Sussex, an archaeologist and an expert on Roman Britain.

‘I’m glad you could come,’ he says and he actually does look glad. A change from most archaeologists, who resent another expert on their patch. And Ruth is an acknowledged expert – on bones, decomposition and death. She is Head of Forensic Archaeology at the University of North Norfolk.

‘Are you down to the foundations?’ asks Ruth, following Max to the summit of the hill. It is colder here and, somewhere high above, a skylark sings.

‘Yes, I think so,’ says Max, pointing to a neat trench in front of them. Halfway down, a line of grey stone can be seen. ‘I think we may have found something that will interest you, actually.’

Ruth knows without being told.

‘Bones,’ she says.

Detective Chief Inspector Harry Nelson is shouting. Despite a notoriously short fuse at work (at home with his wife and daughters he is a pussy cat) he is not normally a shouter. Brusque commands are more his line, usually delivered on the run whilst moving on to the next job. He is a man of quick decisions and limited patience. He likes doing things: catching criminals, interrogating suspects, driving too fast and eating too much. He does not like meetings, pointless discussions or listening to advice. Above all, he does not like sitting in his office on a fine spring day trying to persuade his new computer to communicate with him. Hence the shouting.