This little measure

Roddy Gaskell, grandson of deceased shipping magnate Roderick "The Pirate King" Gaskell, believed in "finders keepers". His family were finders - of a priceless Old Master discovered behind a secret panel, and probably purloined by old Roderick himself. Locked in combat with his puritanical father over the famous oil's fate, Roddy had just consulted the celebrated barrister-detective Antony Maitland when the "hot" masterpiece led to cold-blooded murder. Someone had added lethal monkshood to daddy's daily vitamins, and Roddy was suspect number one. Could Antony prove Roddy innocent ... and find out which art lover was a killer at heart? (Publisher's description)