No.4 - Emigre Manuscript Edit
After you have been to Neameto, return back to the Orphanage in London. Once there, head to the back room on the first floor and talk to the young boy. He'll challenge you to a game of Hide & Seek involving his friends. If you can find all four of his friends hidden throughout the Orphanage and return to the boy within the 60 second time limit, he'll give you access to the Emigre Manuscript. Obtain it by walking up the small stairs behind the boy and examining the large glass object.