For clarity
From Fallen London Wiki
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From: The Rewards of Correspondence
Sometimes the best way to understand something is to explain it to someone else.
Game Instructions: This will increase your Watchful.
Unlocked with 
Corresponding... 5
Success
Thoughts distilled
In the process of structuring your thoughts for another's consumption, you have cleared the corridors of your mind; driven off the cobwebs; shoved open a stuck door or two.
Corresponding... is dropping… (-15 CP)
Watchful is increasing… (+Base 
Watchful CP, up to level 200 + Watchful Gains) (70 at most)
You've gained 1 x Sudden Insight
