"Faithful John" is a German fairy tale collected by the Brothers Grimm, tale number 6.In some variants, a king on his deathbed orders his servant, Trusty John, not to let his son see a certain room, which holds a portrait of a princess. – In all variants, when the new king comes to power, he forces his way into the room. Instantly, he falls in love with the princess. In Joseph Jacobs's version, he...