The forensic archaeologist was a pleasant-looking woman in her early forties, with long brown hair and square, modern glasses, dressed in a roll-neck black pullover, brown trousers and sturdy boots.

Grace gestured with his hand.

‘I suggest we go and do a brief assessment now, but it may not be necessary to start work tonight – especially as it’s dark. These things are always a lot easier in daylight. It sounds as if the skeleton has been there a while, so another day won’t make much difference.’

‘It’s a good thought,’ Grace said. ‘One thing we need to consider, though, is the construction work going on here.’ He looked directly at the Police Search Adviser, a tall, bearded man with an outdoors complexion, whose name was Ned Morgan. ‘You’ll need to liaise with the foreman, Ned. We’ll have to stop the work directly around the storm drain.’

‘I spoke to him on my way in. He’s worried because they’re on a time penalty,’ Morgan explained. ‘He nearly had a fit when I told him we could be here a week.’

‘It’s a big site,’ Grace said. ‘We don’t need to shut the whole of it down. You’d better decide where you want work stopped as part of your search plan.’ Then he turned back to the forensic archaeologist. ‘But you are right, Joan, tomorrow would be better, in daylight.’

He put a call through to Steve Curry, the District Inspector responsible for coordinating uniform police in this area of the city, and advised him that a scene guard would need to be kept on until further notice, which didn’t thrill the inspector. Scene guards were an expensive drain on resources.

Grace turned next to the Crime Scene Manager, Joe Tindall, who had earlier this year been promoted to the post. Tindall gave a self-satisfied smile. ‘All the same to me, Roy,’ he said in his Midlands accent. ‘Now I’m a manager I get to go home at a decent hour. Gone are the days when you and your fellow SIOs can screw up my weekends. I ruin other people’s weekends for you now.’

Secretly, Grace envied him. What’s more, in reality the remains could easily wait until Monday – but now, as he again regretted, they had been discovered and reported, that was not an option.

Ten minutes later, clad in their protective clothing, they entered the storm drain. Grace led the way, followed by Joan Major and Ned Morgan. The Police Search Adviser had advised the other team members to stay in the vehicle, wanting to keep contamination of the scene to a minimum.

All three stopped a short distance from the skeleton, shining their beams on it. Joan Major played hers up and down, then stepped forward until she was close enough to touch it.

Roy Grace, feeling a tight knot in his gullet, stared again at the face. He knew the likelihood of this being Sandy was extremely small. And yet. The teeth were all intact; good teeth. Sandy had good teeth – they had been one of the many things that had attracted him to her. Beautiful, white, even teeth, and a smile that melted him every time.

His voice came out sounding lame, as if it was someone else speaking. ‘Is it male or female, Joan?’

She was peering at the skull. ‘The slope of the forehead is quite upright – men tend to have a much more sloped forehead,’ she said, her voice echoing eerily. Then, holding the torch in her left hand and pointing at the rear of the skull with the forefinger of her gloved right hand, she went on, ‘The nuchal crest is very rounded.’ She tapped it. ‘If you feel the back of your skull, Roy, it’ll be much more pronounced – it normally is in males.’ Then she looked at the left ear cavity. ‘Again, the mastoid process would indicate female – it’s more pronounced in the male.’ Next, she traced the air in front of the eyes. ‘See the skull brow ridges – I’d expect them to be more prominent if this was a male.’

‘So you’re reasonably sure she’s female?’ Grace asked.

‘Yes, I am. When we expose the pelvis I will be able to say one hundred per cent, but I’m pretty sure. I’ll also take some measurements – the male skeleton is generally more robust, the proportions are different.’ She hesitated a moment. ‘There is something of immediate interest – I’d like to know what Frazer thinks.’

‘What’s that?’

She pointed at the base of the skull. ‘The hyoid bone is broken.’

‘Hyoid?’

She pointed again, to a bone suspended from a tiny strip of desiccated skin. ‘Do you see that U-shaped bone? It’s the one that keeps the tongue in place. It’s a possible indicator of the cause of death – the hyoid often gets broken during strangulation.’

Grace absorbed this. He stared at the bone for some moments, then back at those perfect teeth again, trying to remember everything from the last examination of skeletal remains he had attended, at least a couple of years ago.

‘What about her age?’

‘I’ll be able to tell you better tomorrow,’ she replied. ‘On a quick assessment, she looks as if she was in her prime – twenty-five to forty.’

Sandy was twenty-eight when she disappeared, he reflected, continuing to stare at the skull. At the teeth. Out of the corner of his eye he saw Ned Morgan shining his torch beam one direction along the drain, then the other.

‘We ought to get an engineer from the council along, Roy,’ the Police Search Adviser said. ‘An expert on the city’s drainage system. Find out what other drains connect with this. Some of her clothing or belongings might have been washed along them.’

‘Do you think this drain floods?’ Grace asked him.

Morgan shone the beam up and down again pensively. ‘Well, it’s raining pretty hard and has been all day – not much water at the moment, but it’s quite possible. This drain would probably have been built to stop water flooding the rail track, so yes. But…’ He hesitated.

Joan cut in. ‘It looks as if she’s been here some years. If the drain flooded, it’s likely she would have been moved up and down and would have broken up. She’s intact. Also, the presence of the desiccated skin would indicate that it has been dry here for some while. But we can’t rule out flooding from time to time altogether.’

Grace stared at the skull, all kinds of emotions raging through him. Suddenly, he did not want to wait until tomorrow – he wanted the team to start now, right away.

It was only with great reluctance that he told the scene guard to seal up the entrance and secure the whole site.

Abby could not believe it – she needed to pee. She looked at her watch. One hour and ten minutes had passed since she had stepped into this bloody lift. Why? Why? Why had she been so bloody stupid?

Because of the fucking builders downstairs, that’s why.

Christ. It took thirty seconds to go down via the staircase, and that was good exercise. Why? Why? Why?

And now this sharp, biting urgency in her bladder. She had gone only minutes before leaving the flat, but it felt as if she had drunk ten pints of coffee and a gallon of water since.

No way, I am not peeing. I am not having the fire brigade turn up to find me lying in a puddle of urine. Not that indignity, thank you.

She clenched her insides, pressing her knees together, shaking, waiting for the moment to pass, then looked up at the roof of the lift again, at the gridded, opaque lighting panel. Listening. Listening for that footstep she was certain she had heard.

Or her imagination had heard…

In movies, people pulled the lift doors open or climbed out through the roof hatches. But in movies lifts did not sway like this.

The desire to urinate passed – it would be back, but for the moment she felt OK. She tried to get to her feet, but the lift swung wildly again, banging into one of the shaft walls and then another with that deep, echoing boooommmmmm. She held her breath, waiting for it to stop moving. Praying the cable was still holding. Then she knelt, picked her mobile phone off the floor and dialled again. Same sharp beep, same no-signal message.