It’s January 1915 when Detective Inspector Arthur Neil receives a strange letter in the post with a couple of newspaper clippings attached. The clippings describe two seemingly unconnected incidents of women drowning in their own bathtubs. The letter writer asks Detective Inspector Neil to dig a little deeper. And when he does, he unravels a case far darker than he ever imagined.

Murder They Wrote with Laura Whitmore and Iain Stirling is available weekly on BBC Sounds. Subscribe now so you never miss an episode. Email us at lauraandiain@bbc.co.uk.