...As he fervently hoped, jets of live steamrushed through these vents with terrible force and bathed the head ofthe stairs with a scalding, blinding vapor... 
Various 「Astounding Stories, March, 1931」
...The system of communicating tunnels seemed at first only the vents andblow-holes from some previous volcanic activity...
Charles Willard Diffin 「Two Thousand Miles Below」
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