bewrayed > revealed grudge > discontent maltalent > ill-will, malevolence

9 His steed eke seemed to apply his steps to +his+ intent.

eke > moreover apply > adapt, conform his > [Arthur's] intent > frame of mind

CANTO V

Prince Arthur heares of Florimell:
2 three fosters Timias wound,
Belphebe finds him almost dead,
4 and reareth out of +sownd+.

4 sownd > _swound 1609; sownd is not a misprint, but an alternative spelling of swowne, swoune etc. Cf. 601.34:2_

1 Prince Arthur hears of Florimell: 2 three fosters Timias wound,

fosters > foresters

3 Belphoebe finds him almost dead, 4 and rears out of sound.

sound > swoon