4 Now blazed was, and fear did all invade,
blazed > proclaimed; celebrated invade > enter (SUS); hence: possess, daunt
5 That none dared pass through that perilous glade.
That > [So that] glade > (Possibly, referring to the gold and jewels of the shore, meaning a bright, shining or beautiful place. An obsolete meaning is "clear or bright space in the sky". Hamilton (1980) suggests that the coinage/catachresis might be prompted to remind the reader of Mammon's glade at 207.3:1)
6 And, to advance his name and glory more, 7 Her sea-god sire she dearly did persuade
sire > father [Nereus] dearly > earnestly, heartily persuade > recommend; persuade
8 To endow her son with treasure and rich store, 9 Above all the sons that were of earthly wombs borne.
of earthly wombs borne > of earthly wombs born or: by earthly wombs borne
304.22
The God did graunt his daughters deare demaund,
2 To doen his Nephew in all riches flow;
Eftsoones his heaped waues he did commaund,
4 Out of their hollow bosome forth to throw
All the huge threasure, which the sea below
6 Had in his greedie gulfe deuoured deepe,
And him enriched through the ouerthrow
8 And wreckes of many wretches, which did weepe,
And often waile their wealth, which he from them did keepe.