Jane smiled. ‘Since when were you into opera?’

‘I’m not but my dad is.’

Jane knocked on the door and the singing stopped.

A man in his mid-fifties with shiny grey hair opened the door. He was dressed in a tweed suit, white shirt, and tartan bow tie.

‘Come away in. I was just about to open. Are you delivering for development or collecting photographs?’ he asked cheerily. He had a pleasant Scottish accent.

‘Neither. I assume you are Scott Davies, the owner?’ Jane asked, holding up her warrant card.

‘I am indeed, and have been for nearly thirty years. How can I help you, officer?’

Jane told him she and Boon were investigating the murder of a nun from the convent.

‘I couldn’t believe it when I read the News Shopper. I used to go to the convent every summer and take a photograph of them all. It was such a shame it had to close after that dreadful fire. The sisters were lovely lassies, and the wee ’uns were so well-behaved. It was a lot easier to get them organised for a group photo than it was a bloody wedding party, I can tell you.’

‘We were wondering if you kept copies of the photos you took at the convent,’ Jane asked.

‘Aye, I do, but it’s the negatives I keep as they’re easier to store. Funnily enough, I was looking at them just now.’

‘Why was that?’ Boon asked.

‘To see if any of the sisters looked like the drawing in today’s newspaper.’ Davies picked up the Daily Mail to show them Richard Eaves’ artist’s impression on the front page.

‘Did you spot a likeness?’ Jane asked.

‘Ach, it’s hard to say, as the pictures are no’ very big in the viewer. You can have a wee look yourself if you like, or I can set the projector up so you can see them on a screen.’

‘The screen would be helpful, thanks,’ Jane replied.

‘Give me a wee minute and I’ll set it up in the darkroom,’ Scott said, turning the sign hanging on the door back to CLOSED. ‘Please come on through.’

There was a strong odour of rotten eggs in the darkroom, and Davies could see Boon was feeling nauseous.

‘Sorry about the smells. It’s the chemicals I use for processing.’ He turned on the ventilator fan. ‘I’ve arranged these in the order I took them. The first being in 1953,’ he said, pressing the slide control. The first one was a bit blurry, so he adjusted the focus.