The Deep Cellars of Old Newgate
From Fallen London Wiki
And they thought the Neath was dark.
This address allows you to keep 3 Opportunity cards in your hand.
Unlock: Key to the Old Newgate Cellars
To Buy Access: The Way to the Pit
Cost: 
3 x Putting the Pieces Together: the Taste of Lacre
This is a Remote Address: While here you will not encounter any City Vices cards
