Just what is in the box?

From Fallen London Wiki (Staging)
A player-created Guide is available for this content: A Boxful of Intrigue (Guide)

How are the above links here?

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This page contains details about Fallen London Actions.
Each of the seven locks is more complex and subtle than the last. But surely investigation will yield some information?

Unlocked with  exactly 2,

Options:

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Investigating the mysterious box