been > [are]

7 Keeping that slumbered corse to him assigned;

Keeping > Guarding slumbered corse > unconscious body

8 Well knew they both his person, sith of late

his > [Guyon's] sith > since

9 With him in bloody arms they rashly did debate.

arms > {Feats of arms, fighting} debate > fight

208.12

Whom when Pyrochles saw, inflam'd with rage,
2 That sire he foule bespake, Thou dotard vile,
That with thy brutenesse shendst thy comely age,
4 Abandone soone, I read, the caitiue spoile
Of that same outcast carkasse, that erewhile
6 Made it selfe famous through false trechery,
And crownd his coward crest with knightly stile;
8 Loe where he now inglorious doth lye,
To proue he liued ill, that did thus foully dye.

1 Whom when Pyrochles saw, inflamed with rage, 2 That sire he foul bespoke: "You dotard vile,