‘I’m looking. Would help if I knew what I was looking for.’

‘Let’s start with addresses. Can you pull up any addresses throughout the documents for the computers? Is that possible?’

‘You would think, but no. It doesn’t work like that. I have, however, kept a file on any addresses or partial addresses I have come across so far. I’ll send it to you.’

‘Any of them stand out?’

‘There are loads that are easily explainable, some belonging to the people we know about so far. Things like Finn’s halls, Lassiter’s house, the Beacham flat and of course Caitlin’s grandfather’s place. A couple of public places turned up as well. There are a few that I couldn’t get any information on – three to be exact – which is unusual; even online there is often a trail of information about addresses.’

‘Is there?’ Imogen said, it wasn’t something she had ever thought about before.

‘There are sites you can go on to check and see the last sale prices or any planning permissions that pertain to the properties. There are also ancestry-type sites where you can check the historical significance of certain addresses. There are various things that usually pop up.’

‘What about Google Street View? If we pull up images of the properties in question, we might be able to rule a couple out. Or at least pick a place to start. If there’s nothing else on them then it’s worth a shot.’

Imogen was annoyed at having to do this part, but just randomly visiting addresses was a massive time-waster. Sometimes they might turn up to a property only to find out it had been levelled and converted into a nursery school or off-licence. Forewarned was forearmed. Ten extra minutes investigating could save them a good few hours roaming the streets.

‘Smart. I’ll do that now.’

The first image Gary pulled up was of a small unit in Matford Business Park. On Street View there were no markings on the outside, but they couldn’t know how old the photo was.

Gary moved on to the next address.

‘What’s that one?’ Imogen asked, looking at the house on the screen. She wasn’t one to judge a book by its cover usually, but she couldn’t help but notice how sinister the house was.

‘I’ll check with the Land Registry who owns this one; I couldn’t see anything at all about it. It certainly hasn’t been bought or sold in over a hundred years.’

The third one was a building site – a block conversion into flats.

‘I’ll get on to the developers about it.’

‘I’ll take DI Walsh and check out this unit at Matford first, but let me know if you find anything else out about that house before we get there.’

The unit seemed like the most likely culprit, the leasing arrangements on places like that could be very loose. There was an unmistakeable eeriness about the house, but Imogen couldn’t imagine what possible connection Finn Blackwell might have to the place. She left Gary’s office and went to find Matt Walsh.