The Nightmare (1781) by Henry Fuseli

A 1781 oil painting by Henry Fuseli (1741-1825) influenced many writers like William Blake, Mary Shelley, and Edgar Allan Poe whose narrator in "The Fall of the House of Usher" (1839) says, 

An irrepressible tremour gradually pervaded my frame; and, at length, there sat upon my very heart an incubus of utterly causeless alarm. Shaking this off with a gasp and a struggle, I uplifted myself upon the pillows, and, peering earnestly within the intense darkness of the chamber, hearkened --I know not why, except that an instinctive spirit prompted me --to certain low and indefinite sounds which came, through the pauses of the storm, at long intervals, I knew not whence. Overpowered by an intense sentiment of horror, unaccountable yet unendurable, I threw on my clothes with haste (for I felt that I should sleep no more during the night), and endeavoured to arouse myself from the pitiable condition into which I had fallen, by pacing rapidly to and fro through the apartment.

According to Wikipedia, "Poe and Fuseli shared an interest in the subconscious; Fuseli is often quoted as saying, 'One of the most unexplored regions of art are dreams.'"

The Tyger

Painter, poet, and printmaker William Blake (28 November 1757 – 12 August 1827) is known for his unconventional views through his poems and other writings, though he remained relatively unknown during his time. "The Tyger" was first published in Songs of Experience (1794) which was eventually combined with his Songs of Innocence (1789) into one title—Songs of Innocence and Experience, showing the Two Contrary States of the Human Soul: the author and printer, W. Blake.

In 2002, Blake was number 38 in the BBC's poll of the 100 Greatest Britons.

Here's Copy A of Blake's original printing of The Tyger, c. 1795 at The Fall Creek Review.