I know no more about the geography of the antarctic circle than I do of the moon.

I simply criticize from a literary point of view, and I don't like his underground cavern with the stream running through it.

It sounds like one of the voyages of Sinbad the Sailor.
Nor do I like his description; he evidently is writing for effect.
Besides, his style is vicious; it is too stilted.

Finally, he has recourse to the stale device of a sea-serpent." "A sea-serpent!" repeated the doctor.

"Well, for my part I feel by no means inclined to sneer at a sea-serpent.