Ghost

It all began in London one winter night in1870. It was a very cold night.
Two good friends, John and Michael, were walking round London without a penny in their pocket and looking for somewhere to sleep.
They came to a very narrow street called Dove Street and they saw an empty house there. They went in. The house was dark, frightening and cold.
They went up stairs and they arrived at the top of the house.
There was a room with two beds, and they decided to sleep there.
In the middle of the night, one of them, John woke up, because he heard footsteps coming upstarirs.
He Immediately, woke Michael up.
Shortly after, the door of the room opened very slowly and something without a body came in.
John was so frightened that he couldn't move. He only sat and watched the terrible thing. Meanwhile Michael started to run downstairs and out of the house. He found a policeman and they went to the house.
They couldn't find John. A few minutes later they looked through the window and they saw John in the garden, he was dead.
Did John jump out of the window?
Or did the strange thing push him?