Derek Nimmo

After Miss Jane Marple is made a trustee of a merchant marine training vessel, a fellow trustee is poisoned, and ship's officers are later murdered after she comes on board.

A suspected Western spy steals a secret microfilm from China and hides it in the skeleton of a museum dinosaur, prompting a frantic search for it by various interested parties.

Colonel Mostyn of the British Intelligence Service suspects there is a leak in his department and hires an American expatriate to eliminate various targets working for the Soviets.

Czech-speaking, out-of-work Briton Nicholas Whistler is unwittingly sent on a secret mission to Prague by British Intelligence.

A lock-keeper entrusts his daughter with a canal Casanova, and she soon falls pregnant. He refuses to open his locks until the guilty party confesses.