A long question

Yesterday my dad asked a question on How the parents of Lily had the map to The City of gold. Well here is my answer, Lily's mother's grandmother had been in a long reign of people who were given access to the city. once every year they were to put a new treasure inside the city. Near 1900 the tradition stopped when the map to the city dissapeared. The map had been given to Lily's mom and told to keep it in safe keeping. Well that answers the question.
thanks
-Anne