The Boathouse Riddle — J.J. Connington

When Chief Constable Sir Clinton Driffield goes to stay with his friend Wendover, mysterious goings-on in the boathouse he owns soon attract the duo's attention. Lights go on and off, strangers come in and out, and a game warden is found murdered nearby.

And as they work to solve the crime, a second body is dredged up from the lake ...

'Mr J. J. Connington is a name revered by all specialists on detective fiction' Spectator