Surfeit of Lampreys - Ngaio Marsh

Ngaio Marsh's most popular novel begins when a young New Zealander's first contact with the English gentry is the body of Lord Wutherford - with a meat skewer through the eye

The Lampreys had plenty of charm - but no cash. They all knew they were peculiar - and rather gloried in it. The double and triple charades, for instance, with which they would entertain their guests - like rich but awful Uncle Gabriel, who was always such a bore. The Lampreys thought if they jollied him up he would bail them out - yet again.

Instead, Uncle Gabriel met a violent end. And Chief Inspector Alleyn had to work our which of them killed him