I write for ghosts; the ghosts I can’t see but I know stick around. Some I know are good. Others I know are bad. The first bring me nostalgic comfort while the latter instill unease.

In addition to unfinished business, some ghosts haunt so that they will be remembered.

Would it discourage a stalker from stalking if he knew that they knew?

He does love prophesying a misfortune, does the average British ghost. Send him out to prognosticate trouble to somebody, and he is happy. Let him force his way into a peaceful home, and turn the whole house upside down by foretelling a funeral, or predicting a bankruptcy, or hinting at a coming disgrace, or some other terrible disaster, about which nobody in their senses would want to know sooner than they could possible help, and the prior knowledge of which can serve no useful purpose whatsoever, and he feels that he is combining duty with pleasure. He would never forgive himself if anybody in his family had a trouble and he had not been there for a couple of months beforehand, doing silly tricks on the lawn or balancing himself on somebody's bedrail.

("Introduction" to TOLD AFTER SUPPER)

The popular notion that ghosts are likely to be seen in a graveyard is not borne out by psychical research... A haunting ghost usually haunts a place that a person lived in or frequented while alive... Only a gravedigger's ghost would be likely to haunt a graveyard.

Envy, as distasteful as it is, has seeped into my mind on rare occasions, and those I've envied, although few in number, have only been those that live a life of leisure with peace of mind and time to do such wonderful things as read.