AustLit

'Six men are murdered in seven weeks and the most searching enquiry by Scotland Yard fails to disclose any connection between them or any reason anybody could have for killing them. The methods employed are perfectly ordinary, bullet, knife, or bludgeon, and the murders occurred in public places in daylight, yet the investigation is completely held up. It was not until Gilbert Larose, the Australian detective, after a painstaking search for verification of a flimsy guess, built up the first tangible clue that the hunt began. Mr. Gask tells a story of a relentless step by step hunt which brought four men to their deaths.'

Source:

'Murder without Motive', Advertiser, 29 November 1935, p.18.