There's something on the wall.
From Fallen London Wiki
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Is that a message? 'Master Wallerey knows where the Big Bone is locked...' It doesn't mean anything to you, but perhaps someone will pay for this information.
Game Instructions: Spending action points on Opportunities instead of Storylets may bring unexpected rewards, but it's never certain.
Unlocked with 
Preparing for a Daring Escape 1
Card drawn in 
Tutorial Prison
Rewards:
You've gained 1 x Whispered Hint
