The chest requires lockpicking which can be obtained early in the game with skill points. The Cane is a level 6 weapon. Friends at My Back Recruit a gang of 5 .
This video will show you how to find Lord Pearsons Cane located in the Southwark territory, This is a Large Chest collectible for assassins creed syndicate.
There are 26 locked chests to be found in Assassins Creed Syndicate. Each chest holds some nice loot, be it an upgrade part or a piece of clothing, collecting .

Assassins Creed Syndicate - How to Unlock The Worlds Greatest Cane-Sword (Best Strongets Weapon) Gameplay Fully Upgraded Cane Sword For both Evie .