Based on Horler's novel, his second featuring the private detective H. Emp (nicknamed 'Rope'), but there is little information available on the plot.
Aired on BBC Radio (Home Service Basic) on 25 July 1953.
Producer: David H. Godfrey.
Cast members included John Turnbull (Mr Spendlove), Andrew Faulds (James Stampe), Norman Mitchell (Taxi-driver), Alan Reid (Mr Holpin), Eileen Thorndike (Mary Bondfield), Nan Marriott-Watson (Ruth Bondfield), Audrey Mendes (Miss Potter), Cyril Shaps (Charles Hawtry), John Mann (George), Ronald Sidney (Mr Vines), Bryan Powley (Dr Flamingot), Martin Lewis (Francis Laidley), Gladys Spencer (Mrs Laidley), Esme Lewis (Mrs Flamingot), Joan Hart (Mildred Laidley), Peter Bathurst (Emp), Nancy Nevinson (Landlady), Richard Johnson (Gerald Douty), Elizabeth Digbv-Smith (Sonia Hart), Pat Connor (Hubert Trewaine), Owen Fellows (Police Commissioner), and Norman Mitchell (Inspector Harben).
(Production details via Radio Times, 17 July 1953, p.48.)