Green Fairy Book

When he arrived on the beach, he said to the dog: "You are an excellent swimmer, and you, little one, are very light; jump on the dog's back and he will take you to the palace. Once there, he will hide himself near the door, and youmust steal secretly in and try to get hold of my watch."

No sooner said than done. The two animals crossed the sea; the dog hid near the house, and the cat stole into the chamber.