疯狂山脉（X）(12)

Since we could not afford to spend any considerable time in study, we resumed our advance after a cursory look; though frequently casting beams over the walls to see if any further decorative changes developed. Nothing of the sort was perceived, though the carvings were in places rather sparse because of the numerous mouths of smooth-floored lateral tunnels. We saw and heard fewer penguins, but thought we caught a vague suspicion of an infinitely distant chorus of them somewhere deep within the earth. The new and inexplicable odour was abominably strong, and we could detect scarcely a sign of that other nameless scent. Puffs of visible vapour ahead bespoke increasing contrasts in temperature, and the relative nearness of the sunless sea-cliffs of the great abyss. Then, quite unexpectedly, we saw certain obstructions on the polished floor ahead—obstructions which were quite definitely not penguins—and turned on our second torch after making sure that the objects were quite stationary.