Maisie Hitchins longs to be a detective. She's sure there are lots of adventures to be had on the streets of Victorian London. And, together with her faithful puppy, Eddie, she is determined to follow even the slightest scent of a mystery no matter what! In book four of the Maisie Hitchins series, Maisie finds herself coming to the aid of her friend Professor Tobin. The professor has travelled all over the world, collecting strange and wonderful objects. Now he plans to donate his collection to the British Museum including a rare and valuable tribal mask from the Amazonian rainforest. But.