Sequence 4 - Playing it by Ear: Assassin's Creed: Syndicate Walkthrough
Evie's search for the Piece of Eden continues as she examines the Notebook she recovered from Miss Throne's chest. When she returned she gave that book to Green and he researched about the value of information that book contained.
The Book says 'The London Assassin's had found the Shroud of Eden' which is supposed to heat the gravest injury. To find the Next clue Green and you start to hunt mission Playing it by Ear.
Now you need to find the Jackdaw sculpture, yes you got it right, it's the Edward's Kenway the Master Assassin's and the Pirate's Ship sculpture. They say Edward had hidden it in the Kenway Mansion, you need to trespass the mansion and keep away from Miss Lucy.
Along with the room clues, you can also complete the side objective to discover all the Kenway's memorabilia collection. After all the collection head to the Examine room where you need to Press the right key of the Piano to unlock the secret door. The Code is written exactly behind on the Wall(Use Eagle Vision).
You'll see an Underground secret room where you'll find Kenway's vault and the hidden key to unlock the Piece of Eden. Now just escape the Underground to Complete the Mission and avoiding Miss Lucy off course.