Meanings of subterranean treasures in английском

The dragon of the subterranean treasures treats me generously.

The subterranean treasures of the place had been passed unobserved, and another year was to be spent in mines and coal-pits.

First and foremost among these are the gnomes, who guard the subterranean treasures, but who on occasion reveal them to mortals.

Their knavery, it is fancied, stands self-recorded; since, assuredly, they would not be willing to divide their subterranean treasures, if they knew of any.

Then I would see spirits come floating up, who would reveal subterranean treasures to me or give me pebbles which afterward turned into gems.