oppressed > took by surprise; overwhelmed
9 The heavy plague that for such lechers is prepared.
heavy > grievous plague > blow, stroke (see 305.23; also, noted by Hamilton (1980), possibly a reference to venereal disease)
305.15
For soone as he was vanisht out of sight,
2 His coward courage gan emboldned bee,
And cast t'auenge him of that fowle despight,
4 Which he had borne of his bold enimee.
Tho to his brethren came: for they were three
6 Vngratious children of one gracelesse sire,
And vnto them complained, how that he
8 Had vsed bene of that foolehardy Squire;
So them with bitter words he stird to bloudy ire.
1 For, soon as he was vanished out of sight,
soon > [as soon]
2 His coward courage began emboldened be,
courage > heart, spirit be > [to be]
3 And cast to avenge him of that foul despite