5 Where so loose life, and so ungentle trade

so loose > such promiscuous ungentle trade > ignoble conduct

6 Was used of knights and ladies seeming gent:

used of > practised by gent > high-born, noble

7 So early, ere the gross Earth's griesy shade

gross > massive; dense, thick griesy > grim

8 Was all dispersed out of the firmament, 9 They took their steeds, and forth upon their journey went.

They > [Britomart, her "aged Squire" (301.4:3), and the Redcross
Knight]

CANTO II

The Redcrosse knight to Britomart
2 describeth Artegall:
The wondrous myrrhour, by which she
4 in loue with him did fall.