He was back on his stool and had only read through about half a page – none of which he had taken in – when he heard a mumble from Jack.

‘And…we’re in,’ he said, a small note of triumph in his voice. He spun the laptop back towards Nathan. ‘Have a look. Make sure you’re okay with me rooting around in all her personal stuff.’

Nathan spun it back to Jack and dragged his chair round so he could look over Jack’s shoulder. ‘I don’t really care what you find on there. All I care about is finding out if she’s alive and well and in Honolulu, or some other such place she’s got it into her head to visit.’

‘Okay, here we go.’

Tom could hear keys tapping, and there were various grunts and murmurs. He had given up pretending to read and was listening to everything the two men said.

It was only a few moments before Jack spoke.

‘Right,’ he said. ‘There’s an email here confirming her reservation on the mindfulness retreat. There’s nothing of any interest after her return. She hasn’t booked anything, hasn’t chatted to anyone on Facebook. It could be she preferred to communicate by phone, so we’ll have a look at that in a minute. Or it could be in Messenger. Hang on. I’ll open that through her Facebook account.’

Jack tapped away again, and Nathan pushed back his chair and stood up, stretching his arms above his head. He walked over to Tom.

‘Don’t look so worried. Jack is absolutely right to trust me. If he can help me find Hannah, I’ll disappear and I’ll never mention him to anyone.’

Tom knew he was telling the truth. It wasn’t Nathan’s responsibility anyway. It was Jack’s. He could only hope his brother knew what he was doing.

‘Nathan! Come and look at this list.’

Nathan turned. ‘What have you got?’

‘I’ve managed to get into the reservations system for the retreat. There were twenty people on the same course as Hannah – most of them women. Have a look and see if any of the names mean anything to you.’

‘She didn’t mention the woman by name in her letter, but I can check if one of them matches anyone I met on the boat.’

Nathan sat down at the table and read through the list. Both Tom and Jack watched him to see if there was any reaction, although being Nathan, that was unlikely. Finally, he pushed the laptop back towards Jack.

‘Nothing. Sorry. I don’t recognise any of them.’

‘Not to worry,’ Jack said. ‘It was just a shortcut to save hacking the tour company’s database. Give me their name and the dates of the sailings, and let’s see what we can find.’