According to Priwin, Horneligh was devised in an Italian restaurant in Great Portland Street in April 1937 during a meal with John Watt.
The mistake made by the witness is not disclosed until the end of the programme, when the story was partially rebroadcast until the clue was reached, when a voice would call 'Stop'.
One, "Kidnapped", a script by two 13 year-old schoolgirls, Noreen Scott and Stella Reichenberg, who had written a Hornleigh play for a school concert and then sent it in to the BBC, was adapted by Priwin and broadcast on 23 August 1937.
[2][5] Hornleigh was eventually replaced on Monday Night at Eight by another detective, Ernest Dudley's Dr. Morelle, a Harley Street psychiatrist and amateur sleuth.
[7] The BBC radio series presented straight "whodunit" dramas, but the films were made as comedies.
Schaerli wrote that 'L'Inspecteur Hornleigh sur la Piste is confidently expected to add variety to the lessons and to stimulate and sustain the keenness of the students'.