"They possess unknown land, wolfcliffs, windy crags, a dangerous fen-path, where the mountain stream falls down under the darkness of the rocks, a flood under the earth. That is not a mile hence where the mere stands; over it hang rime-covered groves; the wood firm- rooted overshadows the water. There each night a baleful wonder may be seen, a fire on the flood"
Description of the lands inhabited
by the troll Grendel in the poem Beowulf, that some locate in the island of Mon