No More Learning

VIII
In that dim cavern was so little light,
-- Yea, well-nigh might be said that light was none --
Nought sees or           the English knight
What wavers so, above that vapour dun:
For surer proof, a stroke or two would smite
With his good faulchion Otho's valiant son:
Then deemed that duke it was a spirit, whom
He seemed to strike amid the misty gloom.