Ernest Griset - Illustrations from Richard Francis Burton's "Vikram and the Vampire" 1870

You can read the entire book on Archive.org

Giovanni David - A Nightmare, 1775-80

Artwork found at The Metropolitan Museum of Art.

Circle of Jan Brueghel the Younger/Elder (16th-17th Century)

Follower of Jan Brueghel the Younger - The Temptation of Saint Anthony 

Circle of Jan Breughel the Younger - The Underworld 

Circle of Jan Breughel the Younger - The Descent into Hell, 1601-78 

Follower of Jan Brueghel the Younger - The Temptation of Saint Anthony 

Follower of Jan Breughel - The Temptation of Saint Anthony, 17th C

Follower of Jan Brueghel the Elder - The Temptation of Saint Anthony, 16th-17th C 

Follower of Jan Brueghel the Elder - The Temptation of Saint Anthony 

Follower of Jan Brueghel the Elder - Juno's Arrival in Hades, circa 1598

 Image sources include Sotheby's. 

Jan Brueghel the Elder's paintings were previously shared here.

Fritz Schwimbeck (1889-1972)

The Dream, 1909

  The Dream of the Semiramis, 1909

  My Dream, My Nightmare, 1909

  Figure in the Mountains, 1920

  Eternity, 1910

  Pessimism, 1910

  Dracula, 1917

  Dracula, 1917

  A Deam From G. Meyerink, 1917

  In the Vault, 1920

  The Elemental Spirit, 1917

  Entrance of the Fish Frogs, 1919

 

Benjamin Pollock - Characters from Jack and the Giant Killer, for a Toy Theater, 1870–90

After Dieric Bouts - Roundel with Souls Tormented in Hell, 1500-10

Artwork found at The Metropolitan Museum of Art.

James Boswell - Illustrations for "The Exploits of Engelbrecht (Abstracted from the Chronicles of the Surrealist Sportsman's Club)" by Maurice Richardson, 1950

Images found thanks to Gerry Morris. 

An excellent summary of this strange novel can be read at The Best of British Fantasy.

Anonymous Flemish Master - The Nightmare, circa 1580

The artwork is on display at Musée du Luxembourg.