The documents in the case

The grotesquely grinning corpse in the Devonshire shack was a man who died horribly -- with a dish of mushrooms at his side. His body contained enough death-dealing muscarine to kill 30 people. Why would an expert on fungi feast on a large quantity of this particularly poisonous species. A clue to the brilliant murderer, who had baffled the best minds in London, was hidden in a series of letters and documents that no one seemed to care about, except the dead man's son.Sayers, Dorothy L. is the author of 'The documents in the case' with ISBN 9780060550349 and ISBN 0060550341.