The reporters hit one dead end after another. They’re starting to lose hope that they’ll ever land the story, when they get a breakthrough. A private library on the coast of England could hold answers they need.   Read the Investigations team's notebook here: www.telegraph.co.uk/callbethel | For 30 days’ free access to The Telegraph: www.telegraph.co.uk/bethelpodcast | If you have any information that could help the investigation, you can email the team on [email protected] | See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.