9 But you his error shall, I hope, now prove true."
error > (Either Archimago's error in disguising himself as the Redcross Knight, or the error made by the Redcross Knight in killing Sansfoy, which ultimately led to Archimago being wounded and unhorsed) hope > think, predict prove > [through combat]
106.43
Therewith they gan, both furious and fell,
2 To thunder blowes, and fiersly to assaile
Each other bent his enimy to quell,
4 That with their force they perst both plate and maile,
And made wide furrowes in their fleshes fraile,
6 That it would pitty any liuing eie.
Large floods of bloud adowne their sides did raile;
8 But floods of bloud could not them satisfie:
Both hungred after death: both chose to win, or die.
1 Therewith they began, both furious and fell,
Therewith > With that, thereupon fell > fierce, terrible
2 To thunder blows, and fiercely to assail,
assail > attack (quasi-intransitive)
3 Each other bent his enemy to quell,
bent > determined quell > kill (rather than merely vanquish: see line 9)