1 Quit from that danger, forth their course they kept,

Quit > Rescued, released

2 And as they went, they heard a rueful cry 3 Of one that wailed and pitifully wept, 4 That through the sea the resounding plaints did fly:

That through > [So that from one side to the other of] plaints > lamentations

5 At last they in an island did espy

in > [on]

6 A seemly maiden, sitting by the shore,

seemly > fair, pleasing

7 That with great sorrow and sad agony

agony > mental anguish