The Crossing Places

'I didn't know it was today,' says Ruth, backing into the house. Erik follows, rubbing his hands together. He has probably been up for hours. Ruth remembers that one of his traditions on a dig was to see the sun rise on the first day and set on the last.

'Yes,' Erik is saying casually. 'Nelson said it had to be after the funeral and that was yesterday, I believe.'

'It was. I was there.'

'Were you?' Erik looks at her in surprise. 'Why ever did you go

'I don't know,' says Ruth, putting on the kettle. 'I felt involved somehow.'

'Well, you aren't involved,' says Erik shortly, removing his sou'wester. 'High time you stopped all this detective nonsense and concentrated on archaeology. That's what you're good at. Very good. One of my very best students, in fact.'

Ruth, who bridles with indignation at the start of this speech, softens somewhat by the end. Even so, she isn't about to let Erik get away with this.

'Archaeologists are detectives,' she says. 'That's what you've always said.'

Erik dismisses this with a shrug. 'This is different, Ruthie. You must see that. You've given the police the benefit of your professional advice. Now leave it at that.

There's no need to become obsessed.'

'I'm not obsessed.'

'No?' Erik smiles in an irritating, knowing way that reminds Ruth of Cathbad. Have they been discussing her?

'No,' says Ruth shortly, turning away to pour the coffee.

She also puts some bread in the toaster. No way is she going to dig on an empty stomach.

'The poor girl is dead,' says Erik gently, his accent like a lullaby. 'She is buried, she is at peace. Leave it at that.'

Ruth looks at him. Erik is sitting by the window, smiling at her. The sun gleams on his snowy hair. He looks utterly benign.

'I'm going to get dressed,' says Ruth. 'Help yourself to coffee.'

The dig is already well underway by the time Ruth arrives.

Three trenches have been marked out with string and pegs, one by the original Iron Age body, the other two along the path of the causeway. Archaeologists and volunteers are very gently lifting off the turf in one-inch squares; they will aim to put the grass and soil back at the end of the dig.

Ruth remembers from the henge excavation that digging on this marshy land is a tricky business. The furthest trench, which is beyond the tide mark, will fill with water every night. This means it will, in effect, have to be dug afresh every day. And the tide can take you by surprise.

Ruth remembers that Erik always used to have one person on 'tide watch'; sometimes the tide comes in slowly, creeping silently over the flat landscape. At other times the earth becomes water before you have time to catch your breath. These fast tides, called rip tides, could cut you off from land in the blink of an eye.

Even the trenches near to dry land have their problems.

Although Erik has already mapped the area, the land can shift overnight, nothing remains certain. Archaeologists tend to become twitchy if they can't rely on their coordinates.

Ruth

finds Erik leaning over the furthest trench. Because of the shifting ground, the trench is narrow and reinforced with sandbags. Two men are standing in the trench, looking nervously at Erik. Ruth recognises one of them as Bob Bullmore, the forensic anthropologist.

Ruth kneels beside Erik, who is examining one of the posts.

'Are you going to take it out?' asks Ruth.

Erik shakes his head. 'No, I want to keep it in place but I'm worried the waves will loosen it if we dig too far down.'

'Don't you need to see the base?'

'Yes, if possible. Look at this wood though. It looks as if it has been sawn in half.'

Ruth looks at the post. The other, softer wood has been worn away by the constant movement of the tides. What's left is the hard centre of the wood, ragged and somehow menacing-looking.

'It looks like the same wood that was used for the henge posts,' says Ruth.

Erik looks at her. 'Yes, it does. We'll have to see what the dendrochronology says.'

Tree-dating, or dendrochronology, can be amazingly exact. A tree lays down a growth ring each year, more in wet years, fewer in dry years. By looking at a graph showing growth patterns, archaeologists can chart the growth fluctuations. This process is called 'wiggle watching' (Peter always used to find this hilarious). Wiggle watching, combined with radiocarbon dating, can tell you the actual year and the actual season when a tree was felled.

Ruth goes to help with the trench where the Iron Age body was discovered. She still has a fellow feeling with this girl who was fed mistletoe and tied down to die. She sees her as somehow linked to Lucy and Scarlet. She can't help thinking that if she solves the riddle of the Iron Age girl she might just throw some light on the deaths of the other two girls.

More than anything though it is wonderful to be digging again. Like the day when she helped Nelson fill in Sparky's grave, it is a relief to forget the heartache and terror and excitement in uncomplicated, physical labour. Ruth settles down to trowelling, getting into a rhythm, ignoring the twinges in her back and concentrating on moving the soil in neat cross-sections. After yesterday's rain the ground is sticky and sodden.

Cathbad eventually left last night after Ruth promised to help clear his name. She would have promised almost anything to get him out of the house, he was giving her the creeps sitting there in his wizard's cloak with his knowing grin. But, despite herself, as she digs, she can't stop his words running on a continuous loop in her head.

I felt sorry for you because you didn't get a look-in, what with his wife and girlfriend both on the dig…

Did Erik and Shona have an affair on the henge dig?

Shona is very gorgeous and Ruth knows that no man is impervious to beauty (look at Nelson with Michelle). But Erik has a beautiful wife of his own, and one, moreover, who seemed to share his interests and enthusiasms. Ruth thinks of Magda, whom she has always liked and admired.

Magda has almost been a surrogate mother, one who won't say threateningly that she is praying for her or buy her an Oxfam goat for Christmas. Magda, with her sea-blue eyes and ash-blonde hair, her voluptuous figure in fisherman's jumpers and faded jeans, her gleam of Nordic jewellery at the neck and wrists. Ruth remembers once reading about the goddess Freya, the patroness of hunters and musicians, with her sacred necklace and persuasive powers and thinking – that's Magda. Easy to imagine Magda, both youthful and ageless, holding the sacred distaff of life, the power of life and death. How could Erik have risked all this for an affair with Shona?

Is she jealous, Ruth asks herself as she trowels and sifts?

Not sexually jealous. She has always known that Erik could never be interested in her, but she had thought that she was special to him. Hadn't he written on the title page of The Shivering Sand, 'To Ruth, my favourite pupil'? But it turns out that she hadn't been his favourite after all.

Ruth digs her trowel into the soil with unnecessary venom, causing a mini landslide and earning her a shocked look from the dreadlocked girl next to her.

'Ruth!'

Eager to be distracted from her buzzing, unpleasant thoughts, Ruth looks up. Standing in the trench, she sees the newcomer from the bottom up: walking boots, waterproof trousers, mud-coloured jacket. David.

David kneels down on the edge of the trench.

'What's going on?' he asks.

Ruth pushes a lock of sweaty hair out of her eyes. 'It's an archaeological dig,' she says. 'We're excavating the Iron Age grave and the causeway.'

'Causeway?'

'Those buried posts you showed me. We think it's a Bronze Age causeway. A kind of pathway possibly leading to the henge.' Ruth looks down, hoping David won't realise that it was she who told the archaeologists about the posts.

But David has other things on his mind. 'Well, mind you don't go near the hide. The furthest one. There's a rare Long Eared Owl nesting there.'