My Interpretation....I just watched this movie for the first time.
First off, I am a huge horror fan. I thought this movie was fantastic. The mere fact that this movie is over 50 years old and holds up so well is amazing.
Here is my interpretation....
The movie starts with Miss Giddons on an interview. Who is she? Where is she from? What is her past? All unanswered questions. What we do know is that she is hesitant about accepting this job.
Upon her arrival to this mansion she is completely overwhelmed by the beauty and size. This is where the first ''experience'' happens. Miss Giddons hears an angelic voice calling for Flora. Miss Giddons and Flora immediately hit it off however the maid gives us the vibe that something is just not right.
Experience 2 '' Flora mentions that her brother Miles is coming home'' How could she possibly know this?
The children are united and although they are children there is also a mature way to them.
"My feeling is that this beautiful place is actually demonic or possessed" Miss Giddons could feel it when she arrived and it just began to grow stronger.
The past story was the former Governess and a gentleman named Quint. It was said that Quint and the governess were lovers and the governess was succumb to him. She wanted and needed him. If I were to make a reference, it would be the brother and sister relationship in Amityville part 2. The sister knew it was wrong but she could not resist her brother's force or power.
Quint and the former Governess would have relations and make the children watch. I also believe that they would molest and hurt the children. After enough time the pain and the memory of the ordeal would cause these children to lock it away and pretend it never happened.
Another Question: Was Quint and the Governess bad or evil? My answer is no!! They were taken by the demonic forces. My thoughts on Quint's death is that he was fighting the possession which caused him to die. The same thing for the former Governess.
Moving along, the demonic forces were trying to take Miss Giddons. This would mostly happen while she was sleeping.
Miss Giddons began to see "Ghosts" Quint would be seen mostly in the boy's presence and the former Governess would be seen mostly in the girl's presence. They always seemed to have Sad or Anger in their faces. My thoughts are they were in fact trying to protect the children from Miss Giddons. They knew that Miss Giddons was slowly being taken or possessed just as they were.
Miss Giddons and Miles were at the start of having an adult affair. This stemmed when Miles had her in a choke hold. " Did it really hurt or did Miss Giddons like it?" Then Miles kissed her before he went to sleep. Another " Did she like it? Was she going to give in and move forward?" I will get to the very end after my next thought...........
Flora takes the boat and Miss Giddons makes Flora remember what she had tried to forget. The maid says something like, don't make them remember the nightmare..Not sure exactly how it was said.......All of what Flora had hidden had just resurfaced. Flora unable to handle the pain has an emotional breakdown and is unable to recover.
Getting back to the relationship between Miss Giddons and Miles. Miss Giddons orders everyone away to be alone with Miles. Why? My feeling is that Miss Giddons was giving in to the evil or possession. She was going to begin an affair. ( My interpretation of the final scene ) Miss Giddons was going to give in. She does indeed see Quint and she is trying to fight it. When Miss Giddons comes to the realization that she cannot fight anymore, she takes the boy's life. Thus holding him in her arms and knowing that Mile's only way to peace was in death. The end!!!