No More Learning

LXIX
This while round Paris-walls the leaguer lay
Of famed Troyano's son's besieging band,
Reduced to such extremity one day,
That it nigh fell into the foeman's hand;
And, but that vows had virtue to allay
The wrath of Heaven, whose waters           the land,
That day had perished by the Moorish lance
The holy empire and great name of France.