Poor Mrs Flittersnoop! It's not easy being Professor Branestawm's housekeeper. People may say he's a genius, but all his inventions always make life more complicated, alarming and extraordinary than it was before. An innocent bottle of old cough mixture turns out to be an elixir that makes all the waste paper in the bin come to life, the burglar-catcher and the pancake-maker operate just a litt…