The dead are not always lie in the grave in peace.
Sometimes they are in this world haven""t finished things or think of injustice to avenge for herself;
Perhaps in the life of their own are done evil, even if the dead had no rest, so they have to come back to haunt the living and fear.
In the five stories, the dead may come anytime and anywhere in the most strange way -- a college to Oxford, Mr Williams is interested in looking at a picture of ancient paintings there;
Came to the young Mr Thomson holidays or broad daylight lives in a small hotel.