Poison For The Toff (Electronic book text, New edition)

Richard Rollison, otherwise known as the Toff, has become lethargic. Even his passion for solving difficult criminal cases seems to have waned. Aunt Gloria arranges a birthday party so as to cheer him up, but it ends in disaster as one of his souvenirs - a tube of arsenic - disappears, with the contents later re-appearing in the ice-cream. The Toff is spurred into action and the master investigator has to solve one of his most difficult cases ever.