I have liked this story because we are in a srange atmosphere. The dog who appears all the time in Staley's room is the Atwell's dog, what is strange is that Atwell is dead and he was Staley's enemy. So,now, we understand that the dog, who died of starvation on the grave of his master,has come back to avenge him.So, we know at the beginning that there will be a murder and I love murder stories.When I have read first the story, at the beginning,I have had doubts about the physician.But this is a real good story.