Chris is a freelance author and artist who occasionally writes stories for Picture Perfect Comics ('Picture Perfect'). Some ten years ago he created a character called 'Dilly the Dinosaur'. Chris proceeded to write a number of stories about Dilly which were aimed at younger readers, his stories being accompanied by cartoon drawings of Dilly. Picture Perfect published the original stories and cartoons in one of their magazines, TeenyBopper Tales. Dilly the Dinosaur proved to be a great success with children in the 7 to 11 age group. Keen to make money out of the success of Dilly, Chris and Picture Perfect next published a series of books. The series was called 'The Dilly the Dinosaur Series' and consisted of stories and drawings about Dilly, intended to both entertain and educate by introducing young readers to basic scientific information. Again, the series proved to be very successful. Each volume of the series has a picture of Dilly on the front cover as well as the name, 'Dilly the Dinosaur'. Picture Perfect and Chris have just agreed that it would be a good idea to develop Dilly the Dinosaur merchandise. They have approached Speedy Ltd with a view to negotiating a licence to produce greetings cards and posters based on the Dilly character. At a meeting last week, Speedy informed them that there were already a number of other merchandisers selling Dilly the Dinosaur products. In particular, Speedy mentioned the activities of: (a) Rupert, who is selling T-shirts and other items of clothing bearing pictures of dinosaurs that look like Dilly; (b) Framleys, a well-known department store, which is selling cuddly toys in the shape of dinosaurs; (c) Mrs Mayson, who has opened a 'Dilly the Dinosaur' coffee shop. Advise Chris and Picture Perfect as to whether or not they could stop the unofficial merchandising activities of Rupert, Framleys and Mrs Mayson