The ghosts of spirits, from the grave of John Barley Corn.  From Life, 1920.

"They were still standing there in the open door."  From The Unknown Lady by Justus Miles Forman, 1911.

The road to ruin is marked by memory, ghosts, moonlight, and weeds (not pictured).  From Roman Presences: Receptions of Rome in European Culture, 1789-1945 (1999).

"Hardly had he said this, before both the animals vanished."  From Fairy Tales from Afar, of Sven Grundtvig, 1902.

Some haunted wallpaper from Kladderadatsch, 1923.

That horses see ghosts is apparent in their expressions.  From Der Orchideengarten, 1920.

From Judy, Or The London Serio-Comic Journal, 1878.

"That cold-blooded demon which we call Science is killing romance from amongst us.  Years ago everybody believed in the wonders of the invisible world, and ghosts were among the regular inhabitants of every rural district.  Now, we are so seldom suffered to see or hear of a ghost, that a visitation has the effect of novelty."  From Chambers's Journal, 1889.

The ghosts of fur coats.  From Life magazine, 1920.

"These psychic times."  From Life, 1920.

"All but Luella shone white in the moonlight."  From The Wind in the Rose-bush and Other Stories of the Supernatural by Mary Eleanor Wilkins Freeman, 1903.

Ghosts of paperwork.  From Fliegende Blätter, 1934.

An illustration from an 1895 issue of Pall Mall magazine.  The caption reads: "She cautiously ventured one foot into the black-looking water."