Full name Sidney Hobson Courtier (28 Jan 1904-1974), born in Kangaroo Flat, Victoria. Australian teacher/principal; President P.E.N. (Melbourne branch) who has written 22 mystery/detective novels with series characters Inspector "Digger" Haig and Inspector (later Superintendent) Ambrose Mahon (often ingenious, sometimes in bizarre physical settings)
World-famous singer Polly MacMurtha had given many people strong cause to hate her, and most of them were present at her first recital on her return to Australia after fourteen years abroad.
Small wonder, then, when Polly was murdered during the interval, that Superintendent Ambrose Mahon had too many suspects.