Mrs Jeffries Rocks The Boat

Mirabelle Daws travelled all the way from Australia to Sheridan Square to visit her sister - only to die in the middle of a locked garden. All the residents of Sheridan Square have a key to the garden - but no-one seemed to know that Mirabelle was planning to arrive. So the question facing Mrs. Jeffries and Inspector Witherspoon is: who wanted to make sure that Mirabelle''s visit was very, ve...