Bobby studied the Rembrandt intently, with his own strange intensity of gaze that seemed as if by sheer strength of will it could force all secrets to reveal themselves.

Commander Bobby Owen receives a visit from private detective Marmaduke Groan. Groan is concerned about a missing client, the influential art critic Alfred Atts. Due to give a much-anticipated Royal Arts lecture, Atts promised to use the occasion to reveal sensational facts. But he vanished before getting the chance.

And Mr Atts had suspected his wife of wanting to poison him ...

Triple...