Paul B. Du Chaillu, The Viking Age. Volume 1 (of 2…
“ He is the warden of the gods, and sits there at the end of heaven to guard the bridge against the Berg Risar (mountain Jötnar) ; he needs less sleep than a bird, he can see equally by night and by day a hundred leagues away, and he hears when the grass grows, or the wool on the sheep, and all that is louder than these. He has the horn called Gjallarhorn, and his blowing is heard through all worlds. The sword of Heimdall is called Höfud” (Gylfaginning, 27) .We find that the Jötnar and Asar were separated from each other by a large river whose waters never freeze. ”
