"Hard-headed business man (to shade of departed wife): Now, look here, Mary Ann, remember this is costing me over five dollars, and try to say something sensible!"  From Life, 1920.

A ghost dog from Life, 1920.

From Der Orchideengarten, 1919.

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

"The authors (one a spirit picture.)"  From Her Invisible Spirit Mate by Mrs. C. W. Glass, 1917.  See The Ghost in the [Scanning] Machine.

From Paul Ardenheim, the Monk of Wissahikon by George Lippard, 1848.

"Transparent man like ghost."  From Popular Mechanics, 1930.

When vintage fashion styles come back, they attract ghosts.  From The Judge, 1916.

"The Medium" by Al Lunois.  From Jugend, 1920.

Before music "streaming," there was music "steaming," which required a small burner and the cooperation of departed musicians.  From The Judge, 1916.

Here's the answer to how much it costs to get an ancestral spirit to lend tone to a place.  "It depends."  From "Uncle's Ghost" by Owen Oliver, in The London Magazine, 1902.

A lawn mowing ghost.  From Cartoons Magazine, 1920.

"There appeared to her three very beautiful spirits, clothed in white."  From The Bird of Truth and Other Fairy Tales by Fernan Caballero, 1881.

This is how, if you aren't careful about the artwork near your bed, you can end up with a family.  From L'Assiette au Beurre, 1901.

If you've ever wondered about people you encounter, here's the explanation: "In every thousand people who are living on this earth, not more than one is alive."  From The Art of Being Alive by Ella Wheeler Wilcox, 1914.

"The man who could not forget" — an illustration by Alec Ball for London Magazine, 1902.

From Echoes of Life and Death by William Ernest Henley, 1908.