5 Thereat, with staring eyes fixed askance,

Thereat > Thereupon; as a result of that staring > glaring (cf. 204.15:6)

6 In great disdain he answered: "Hardy Elf,

Hardy > Rash, presumptuously audacious

7 That dares view my direful countenance,

direful > terrible, dreadful

8 I read you rash, and heedless of yourself,

read > consider

9 To trouble my still seat, and heaps of precious pelf.

pelf > money, cash, "filthy lucre"