An anthology of weird stories

A catholic school

There was a Catholic school in Goa which was rumored to be haunted.  One day, a teenage girl stayed late after classes were over to finish some schoolwork.  As she was walking down the deserted hallway, she entered an open classroom.  Out of the corner of his eye, he saw a figure standing in the classroom.  She went back and peeped in the door.  There was a nun standing there, writing on the blackboard.  The nun suddenly turned towards him and the girl gasped in fear.  The old woman had no face.  Her features were smooth as an egg.  The girl screamed and ran away in fear.  He had seen what was written on the blackboard.  In scattered, spidery handwriting were the words: "Help me I'm in hell."