In chapter three of Voltaire's 1747 novel Zadig, there is an adaptation of "The Three Princes of Serendip", this time involving, instead of a camel, a horse and a dog, which the eponymous Zadig is able to describe in great detail from his observations of the tracks on the ground. When he is accused of theft and taken before the judges, Zadig clears himself by recounting the mental process which allows him to describe the two animals he has never seen: "I saw on the sand the tracks of an animal, and I easily judged that they were those of a little dog. Long, shallow furrows imprinted on little rises in the sand between the tracks of the paws informed me that it was a bitch whose dugs were hanging down, and that therefore she had had puppies a few days before."