6 Does belch out flames, and rocks in pieces broken, 7 And ragged ribs of mountains molten new, 8 Enwrapped in coal-black clouds and filthy smoke, 9 That all the land with stench, and heaven with horror, choke.

111.45

The heate whereof, and harmefull pestilence
2 So sore him noyd, that forst him to retire
A little backward for his best defence,
4 To saue his bodie from the scorching fire,
Which he from hellish entrailes did expire.
6 It chaunst (eternall God that chaunce did guide)
As he recoyled backward, in the mire
8 His nigh forwearied feeble feet did slide,
And downe he fell, with dread of shame sore terrifide.

1 The heat whereof, and harmful pestilence,

whereof > of which pestilence > noxiousness

2 So sore him noyed, that forced him to retire

noyed > vexed, harassed; injured that > [that it]

3 A little backward for his best defence, 4 To save his body from the scorching fire, 5 Which he from hellish entrails did expire.

he > [the dragon] expire > exhale

6 It chanced (eternal God that chance did guide) 7 As he recoiled backward, in the mire 8 His nigh forwearied feeble feet did slide,