8 There those five sisters had continual trade,

trade > {Occupation, habitual course of action}

9 And used to bathe themselves in that deceitful shade.

shade > shadow (cast by the hill)

212.31

They were faire Ladies, till they fondly striu'd
2 With th'Heliconian maides for maistery;
Of whom they ouer-comen, were depriu'd
4 Of their proud beautie, and th'one moyity
Transform'd to fish, for their bold surquedry,
6 But th'vpper halfe their hew retained still,
And their sweet skill in wonted melody;
8 Which euer after they abusd to ill,
T'allure weake trauellers, whom gotten they did kill.

1 They were fair ladies, till they fondly strove

were > [had been] fondly > foolishly

2 With the Heliconian maids for mastery;

the Heliconian maids > (The Muses, who live on Mount Helicon; see notes at 212.52:8)