ample > broad
3 And, her sword's point directing forward right, 4 Assailed the flame, which eftsoons gave place,
eftsoons > thereupon; forthwith
5 And did itself divide with equal space,
with equal space > [equally]
6 That through she passed; as a thunderbolt
That > [So that]
7 Pierces the yielding air, and does displace 8 The soaring clouds into sad showers melted;
sad > heavy
9 So to her yielded the flames, and did their force revolt.