The Complete Steel written by Catherine Aird performed by Robert Bailey on Cassette (Unabridged)

There were two things seriously wrong when someone found Mr Meredith in the library of Ornum House and greeted him with a 'Good morning'. For one thing, it was five o'clock in the afternoon; and for another, the greeting took the form of a murderous blow to the back of poor Mr Meredith's head.

But Inspector Sloan doesn't discover any of this until he finds the weapon, a large primitive club, topped with an iron spike. It is hanging in Lord Ornum's armoury, labelled 'Godentag' which, as the Vicar explains, taken literally means good morning.