c.1220, Sturluson, Snorri.Gylfaginning (The Fooling Of Gylfe):
Margir staðir eru þar gǫfugligir. Sá er einn staðr þar, er kallaðr er Álfheimr. Þar byggvir fólk þat, erLjósálfar heita, en Dǫkkálfar búa niðri í jǫrðu, ok eru þeir ólíkir þeim sýnum ok miklu ólíkari reyndum.Ljósálfar eru fegri en sól sýnum, en Dǫkkálfar eru svartari en bik."
"There are many magnificient dwellings. One is there called Alfheim. There dwell the folk that are called light-elves; but the dark-elves dwell down in the earth, and they are unlike the light-elves in appearance, but much more so in deeds. The light-elves are fairer than the sun to look upon, but the dark-elves are blacker than pitch."