Marcus’s room adjoining Posy’s made things a lot easier than Caro had expected – but it did mean they had to pass through Posy’s room to get there. The room was oppressively blue and white, and Posy winced as she opened the door.

‘This room definitely worked better in fiction,’ Caro observed, as they trooped inside. ‘When we filmed it, we just had the one wall and the bedspread blue and white. I think viewers would have switched off to save their eyeballs, otherwise.’

‘My eyeballs sadly continue to suffer.’ Posy crossed the room to a door hidden in the wall by the matching wallpaper that covered it. It was only noticeable because of the heavy key sticking out of the keyhole.

‘Wait!’ Rosalind said. ‘If Ashok was in here last night at dinner, that means he was looking for something. Shouldn’t we figure out what?’

‘The magnifying glass, I assume,’ Posy said, with a small frown. ‘But that’s still hidden in my shoe in the wardrobe. I checked this morning.’ She opened the wardrobe door and pulled out the shoe – and loupe – to prove the point.

‘Either he’s rubbish at searching, or he was looking for something else,’ Caro said. ‘But what?’

‘I have no idea.’ Posy glanced around her as if hunting for clues. ‘The script? The blackmail photos and note? I had all those with me in my bag.’

‘Maybe,’ Caro said. ‘Come on. Let’s check Marcus’s room.’

The Jack-and-Jill bathroom was soothingly white, and the door on the other side helpfully unlocked. Beyond it, Marcus’s room was plainer than Posy’s, or Caro’s for that matter. Clearly designed as a Man’s Room, there was little in the way of decoration besides two decorative guns on the wall, and an etching of a hunt by the window. The bed was covered with a tartan blanket, and a heavy wooden desk with a leather top sat along the wall beside the bathroom door.

‘Where do we start?’ Posy asked. The police had sealed off the doors to the room with tape, which they all ducked under, but otherwise left it untouched.

‘You check the bed, Rosalind the wardrobe, I’ll take the desk,’ Caro said, decisively.

She had no idea what the others might find – she suspected Marcus had more secrets than she was privy to – but she also knew she stood the best chance of finding what she was looking for in the desk. Marcus was a creature of habit, after all, and while she might not have been in this particular bedroom before, she had been in others.

They moved quickly, none of them keen to stay in a dead man’s quarters longer than necessary – or to be found there by someone else. Caro yanked open the desk drawers and found not much of interest; a paperback novel – not a Lettice Davenport – a blank pad of paper, and a few pens.