of all, the detective sergeant coming in with a notebook and a pen and an endless list of questions when everyone just wanted to go home. ‘I know it’s frustrating, Mrs Weldon, but we’ll try not to keep you for much longer. Do you need to let someone know you’re running late?’
She shook her head. ‘I live alone since my husband died. No one’s waiting for me. But I got here at five this morning and I’m tired.’
‘Early start.’ The comment came from over my shoulder, where DI Josh Derwent had apparently decided to take an interest in the conversation. ‘That’s keen.’
‘Of course. It’s the best time to be here. Before all of … this.’ She gestured at the footbridge over our heads, where the tide of commuters heading to work in the City formed a second river, flowing as ceaselessly as the Thames towards the great dome of St Paul’s. ‘It’s so busy now. I can’t even think.’
It seemed quiet enough to me, but Derwent nodded. ‘Let’s find somewhere more peaceful where we can talk. A café, or—’
‘The best place to talk around here is down there.’ She gestured over the wall to the foreshore, a strip of shingle a few metres wide that extended to the left and right along the river bank. ‘I can show you where I was. Easier than having to describe it all.’
‘How do we get down there?’ I asked.
‘There are steps.’ She set off towards them, moving briskly, and we followed her obediently. ‘But you’ll have to come down one at a time and mind how you go. It’s steep and it gets slippery.’
The steps were concrete and more like a ladder than stairs. The treads were so narrow I had to step sideways, juggling my bag and clipboard awkwardly, off balance. My long coat threatened to trip me up at every step. Kim Weldon was short and had a low centre of gravity, unlike me, so that explained why she had found it easy. On the other hand, Derwent was taller than me – just – and he had rattled down in no time, as light on his feet as a boxer despite his broad-shouldered build. He stood at the foot of the thirty or so steps and watched my progress, which didn’t help.
‘You could come down backwards.’
‘This is fine.’
‘Do you need a hand?’
‘I can manage.’
‘Only we all have other places to be.’
‘I know,’ I said through gritted teeth, concentrating on placing my feet carefully. The shingle below shimmered in the morning light, out of focus and dizzy-making.
‘Like a cat coming down a tree. I can call the fire brigade out to rescue you if you like. It’s not as if Trumpton have anything better to do.’
‘I’m fine,’ I snapped, and ignored the hand he reached up to help me down the last few steps. He stuck it back in his coat pocket with a grin that I also ignored as I made it to the shingle at last. Kim Weldon was watching us with interest. Considering I spent so much time assessing witnesses it shouldn’t have surprised me to remember it was a two-way process. I tried to see us as she might: officialdom in dark trouser-suits and polished shoes, Derwent’s hair cropped close to his head in a way that hinted at a military background, broodingly handsome. I was younger than him as well as junior in rank and aimed to be as neat, though my hair was already beginning to spiral free from the bun I’d trapped it in. We stepped around each other with the practised ease of longstanding dance partners. As a rule, Derwent was rude enough to me that even people who knew us well suspected we were sleeping together, or hated each other, or both. The truth was that we’d never slept together, and I only hated him from time to time. We were closer than most colleagues, it was fair to say – friends, after all we’d been through together. There was also the fact that he was my landlord. I currently lived in a one-bedroom flat he owned, though I fully intended to look for somewhere else to live. I just hadn’t got around to it yet. We bickered like children and trusted each other’s instincts without even thinking about it.
No wonder Mrs Weldon looked puzzled.
‘Where do we need to go?’ I asked her.
‘Along here.’ She gestured to the left of the bridge. ‘That’s the way I went this morning. I came down the steps around five, as I said. Sunrise is about half past five at this time of year but it was starting to get light. I could see well enough without a head torch.’
‘Do you do this often?’ Derwent asked.
‘Most days.’ She smiled, looking out across the river and breathing deeply. The air was fresh down by the water, and the hum of the city seemed to recede. Seagulls hovered overhead, peevish and mocking as they floated on the cool spring breeze. ‘This is my place. I’m a licensed mudlarker. I take what the river chooses to give me, whether it’s treasure or trash.’
‘Treasure?’ Derwent scuffed the shingle with the toe of his shoe. ‘What kind of treasure?’
‘Nothing valuable, exactly. But items of historical interest. And sometimes the trash is interesting too.’ She bent and picked up a small white tube. ‘What do you think this is?’
I peered at it. ‘A bit of china?’
‘It’s the stem of a clay pipe. I can’t date this without having the bowl, and the bowls are harder to find, but it could be from the 1600s. The pipes were in common use up to Victorian times. When they broke, they couldn’t be repaired and people would chuck them into the river.’
‘An antique fag end.’
She looked at Derwent sharply, her eyes bright. ‘You don’t see the appeal, Inspector. But that’s a little piece of London’s history. The man or woman who smoked it is long gone and forgotten, but we know they were here. I might be the first person to touch it since they flung it in the water.’
‘What sort of things do you find?’ I asked.
‘I’ve found Roman glass once or twice, and coins, and bits of pottery. Last year I found a medieval die made out of bone. How did it end up here? Maybe someone flicked it into the river because they’d had a run of bad luck, or maybe they stumbled as they boarded a skiff to cross to the other bank and it fell out of their pocket. There are a hundred possibilities, a hundred stories in one small scrap of history. My favourite was a bone hairpin that was a thousand years old. That’s in the Museum of London, now, with my name recorded as the person who found it. That pin will still be there long after I’m gone too.’
‘And people will know you were here,’ I said.
The fan of wrinkles around her eyes deepened as she grinned. ‘Everybody wants to leave a trace of themselves behind, after all – some evidence they walked the earth. One day someone might be grateful I was in the right place at the right time to find something special. That keeps me coming back.’
‘So what was different about this morning?’ I asked.
‘Nothing. Everything was the same as usual. At least it was until I found it. Then everything went sideways.’ A low chuckle. Kim Weldon struck me as the kind of person who didn’t allow herself to be unsettled by anything; if what she had found upset her, she had got over it by now.
But I noticed she said ‘it’, rather than what she had found.
‘Where were you when you saw it?’
She pointed. ‘See the white stripe on the wall? I was halfway between here and there. I always give myself a marker to reach because it’s too easy to get distracted and forget to keep an eye on the tide. You can get caught out – never happens to me but I’ve seen other people get soaked. So I always give myself a limited search area and then I go once I’ve covered it.’
A Thames Clipper barrelled past, ferrying commuters up the river, and the wake sent a wave that splashed over one of Derwent’s shoes. He stepped back quickly, swearing under his breath, shaking his foot.
‘It’s all right, the water is quite clean these days. They’ve