1 Heart cannot think what outrage, and what cries,
Heart > Mind
2 With foul enfouldred smoke and flashing fire,
enfouldred > {?As black as a thunder-cloud. SU; cf. 202.20:9}
3 The hell-bred beast threw forth to the skies, 4 That all was covered with darkness dire:
That > [So that]
5 Then, fraught with rancour and engorged ire,
fraught > filled engorged > swallowed; hence: internal, swelling, choking
6 He cast at once him to avenge for all,
cast > decided, resolved him > [himself] for all > [once and for all]