erst > lately weet > understand, learn

8 To been with Guyon knit in one consent,

been > [have been; be] consent > accord

9 The ill which erst to him, he now to Guyon meant.

ill > evil erst > earlier; recently him > [the Redcross Knight] meant > intended; or, perhaps ment (ppl. of "meng") joined, attached

203.12

And comming close to Trompart gan inquere
2 Of him, what mighty warriour that mote bee,
That rode in golden sell with single spere,
4 But wanted sword to wreake his enmitee.
He is a great aduenturer, (said he)
6 That hath his sword through hard assay forgone,
And now hath vowd, till he auenged bee,
8 Of that despight, neuer to wearen none;
That speare is him enough to doen a thousand grone.

1 And, coming close to Trompart, gan inquire

gan > did

2 Of him what mighty warrior that might be, 3 That rode in golden sell with single spear,