Unlike the base game, Jack the Ripper keys are hidden in:
Note: The final three locked chests are located in these restricted areas and cannot be accessed via free roam.
The most efficient way to locate every chest is to purchase in-game Treasure Maps Availability
Locked chests (often called "golden chests") contain unique crafting materials and gear rather than just currency. In the DLC, there are 6 locked chests across all areas:
In the Assassin's Creed Syndicate: Jack the Ripper DLC, there are scattered across London and mission-exclusive areas. To achieve 100% synchronization for the "Ripperologist" trophy, you must collect all of them, along with Illustrations and Helix Glitches. Essential Map & Collection Strategy
