Story related, can’t miss. Chapter 6, after “Investigating the Lambs’ Club” set. Go to Alice’s shop, and look at the long neck postcard in the rack. Go to the dining hall in Christ Church and look at the top of the right statue in the fireplace. Click it’s head three times to take the next piece. Go across to the paintings, examine the logo in the bottom corner of the large one then the book in the painting. Use Sam’s Swiss Army Knife to get the last puzzle piece, then put the puzzle together. Go to the meadow off of Christ Church garden, and find the rabbit hole. Enter the combination 539472277655 and take the coin. Return to Dread Hill, pick up invitation from table by phone then examine both coins. Use the map of London from Alice’s shop and select the locations from the coins, joining them up to form an “X” marking the spot, and the achievement will pop.