The Binding of Fenris
Dorothy Hardy
By magic arts the dark elves manufactured a slender silken rope from such impalpable materials as the sound of a cat’s footsteps, a woman’s beard, the roots of a mountain, the longings of the bear, the voice of fishes, and the spittle of birds, and when it was finished they gave it to Skirnir, assuring him that no strength would avail to break it, and that the more it was strained the stronger it would become.
“Gleipnir, at last,
By Dark Elves cast,
In Svart-alf-heim, with strong spells wrought,
To Odin was by Skirnir brought:
As soft as silk, as light as air,
Yet still of magic power most rare.”
Valhalla (J. C. Jones).