Classic crime from one of the greats of the Detection Club

A rich, curmudgeonly old husband, a beautiful young wife, a mysterious voice from the past - and murder...
When murder hits the sleepy town of Hinton St Luke tongues start wagging. It''s what you might call a cosy domestic murder: a beautiful young wife; her much-older husband dying at just the right moment; a jealous nurse; a mysterious voice from the past and a set of anonymous letters.
But which one will lead directly to the killer''s front door?