In the unlikely event you needed proofs of the spirit world, here they are.  From Proofs of the Spirit World by Léon Chevreuil, 1920.

Of Drinking in Remembrance of the Dead by Peter Browne, 1713.  See also this collection of 112 cocktail recipes to be drunk in remembrance of the dead: Of Drinking in Remembrance of the Dead.

"We never sleep."  The cover of The Somnambulist and the Detective, The Murderer and the Fortune Teller by Allan Pinkerton, 1874.

From Yermah the Dorado by Frona Eunice Wait, 1897.

There's an ironic subliminal message in this book cover — the middle of the word "exposed," "pos," is highlghted by the box behind it, suggesting "positive."  Spirit Rapping Exposed by John Henry Anderson, 1860.  See Seance Parlor Feng Shui.

The Fireside Magician by Thomas Picton, 1879.

Fairy Tales by Édouard René Lefebvre Laboulaye, 1887.

La Vellma's Vaudeville Budget for Magicians, Mind Readers, and Ventriloquists by David J. Lustig, 1921.

From Jack Frost, Or, God's Finger in the Winter by Ina Hervey, 1870.

My Lady Vaudeville and Her White Rats by George Fuller Golden, 1909.

By "A Mere Phantom."  The Magic Lantern, How to Buy and How to Use It, Also How to Raise a Ghost, 1866.

You've heard of May/December marriages, but unmarried life is measured in afternoons, not months or seasons.  (We like how someone named Penny gives her two cents on all this.)  The Afternoon of Unmarried Life by Anne Judith Penny, 1859.   See also The Collected Lost Meanings of Wedlock.

"How to get into this book."  From English Fairy Tales by Joseph Jacobs, 1890.  See Machinarium Verbosus: A Curiosity Cabinet of Gadgets to Transform Any Book & Reader, To Be Sure.

Magic, White and Black by Franz Hartmann, 1890.  See The Young Wizard's Hexopedia.

Two London Fairies by George Robert Sims, 1906.