Small boy Dave and his dog Dusty walk past a second- hand bookshop. Dave stops to look at the books displayed on bookcases outside. Dave picks up a heft tome called 'The Law of Income Tax' and flicks through it.
Dusty scratches at a book on a lower shelf called 'Our Cats'. It falls onto the ground and he noses inside. Dave suddenly thinks he might be made to buy something by the shopkeeper so he puts the books back and rushes off with Dusty in his arms.