One need not be a chamber to be haunted.

One need not be a Chamber — to be Haunted — One need not be a House — The Brain has Corridors — surpassing
Material Place —

...for no man lives in the external truth among salts and acids, but in the warm, phantasmagoric chamber of his brain, with the painted windows and the storied wall.

No ghosts need apply.

- Sherlock Holmes: The Adventure of the Sussex Vampire

In homes, a haunted apparatus sleeps,
That snores when you pick it up.
If the ghost cries, they carry it
To their lips and soothe it to sleep
With sounds. And yet, they wake it up
Deliberately, by tickling with a finger.

To live is to be haunted.

I don't — know about ghosts, but I do know that our souls can be made to go outside our bodies when we are alive... A very easy way to feel 'em go is to lie on the grass at night, and look straight up at some big bright star; and by fixing your mind upon it you will soon find that you are hundreds and hundreds o' miles away from your body, which you don't seem to want at all.

Certainly, the terror of a deserted house swells in geometrical rather than arithmetical progression as houses multiply to form a city of stark desolation. The sight of such endless avenues of fishy-eyed vacancy and death, and the thought of such linked infinities of black, brooding compartments given over to cob-webs and memories and the conqueror worm, start up vestigial fears and aversions that not even the stoutest philosophy can disperse.

There are haunters of the silence, ghosts that hold the heart and brain.

There is a mirror in my room </br> Less like a mirror than a tomb, </br> There are so many ghosts that pass </br> Across the surface of the glass.