Investigate a rumbling (The Waswood)
From Fallen London Wiki
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From: Beneath Parabolan Streets
The tunnels are overtaken by noise and vibration.
Unlocked with 
When you Find Yourself in a Hole, Keep Digging exactly 2
Success
Rumblings
The digging ceases […]; the entire tunnel shakes. […] is the tunnel about to collapse? The shaking of the earth forces you to steady your weight against the […] wall.
And then, just as soon as it began, the tremor ceases. All appears to be well, for now.[Find the rest of the story at https://www.fallenlondon.com]
You've gained 1 x Sudden Insight
The time has come to clamber out of this hole. (Sets 
When you Find Yourself in a Hole, Keep Digging to 3)
Redirects to: Beneath Parabolan Streets
