Clarke & Clarke William Morris Strawberry Thief Slate/Blush Wallpaper. This is William Morris's most iconic pattern, Strawberry Thief tells the story of a cheeky, fruit thieving bird. It is intricate and highly ornamented, this cherished design is a riot of colour and expressive detail. With a reduced scale, Strawberry Thief is perfect for decorating spaces of all shapes and sizes.