You have to said that John Taylor went to 7 Felka Utca to talk to people like Mrs.Fischer.Secondly,John Taylor went to Public Library to find out more about incident that cause at 7 Felka Utca or Gergeily Utca.Thirdly,John Taylor went to Public Record Office to find more information about Janos Szabo.So this evidence shown that John Taylor was so determined to search about his doppelganger.