Skeleton in search of a cupboard

The luncheon party in honour of Henrietta Cosgrove's 80th birthday has gone well. Her five stepchildren had gathered in her lovely old thatched house to enjoy the food prepared by Freda. Henrietta then drops a bombshell -- to shore up her dwindling income, she proposes to sell two landscape paintings by a hitherto unknown artist whose work has been "discovered." The alternative is to sell the house, something that no one supports. That night,...