The Boulder and the Holy Grail

The Boulder is introduced as an Icelandic folktale, however I think it is another rendition of the holy grail myth. The "uncle" is on a "quest" to find a missing grail so he can return it to the Huldur folk who live in the boulder. The Huldur folk were the rightful owners of the cup, similar to the rightful protectors of the holy grail (ie: Joseph d' Arimethea by Robert de Bron). The uncle seems to be the type of a grail hero in this tale as Perceval and Galahad are in other tales. The grail's associaion with a pagan temple is similar to Welsh myths of the search for a magic cauldron with magical properties. A significant difference between the Boulder and the Grail myths, is the perspective. In grail myths is stated early on that they characters are in search of a holy grail. In the Boulder the search for the grail is revealed only after the grail has been found.