Frankenstein was inspired by a dream Mary Wollstonecraft Shelley had at Lord Byron's villa. It was stormy a lot so the guest's at his house often stayed in and read horror storied. One time he challenged his guest's to make their own horror stories, and that night Mary had a dream.
"When I placed my head upon my pillow, I did not sleep, nor could I be said to think... I saw -- with shut eyes, but acute mental vision -- I saw the pale student of unhallowed arts kneeling beside the thing he had put together. I saw the hideous phantasm of a man stretched out, and then, on the working of some powerful engine, show signs of life, and stir with an uneasy, half-vital motion. Frightful must it be; for supremely frightful would be the effect of any human endeavor to mock the stupendous Creator of the world.
...I opened mine in terror. The idea so possessed my mind, that a thrill of fear ran through me, and I wished to exchange the ghastly image of my fancy for the realities around. ...I could not so easily get rid of my hideous phantom; still it haunted me. I must try to think of something else. I recurred to my ghost story -- my tiresome, unlucky ghost story! O! if I could only contrive one which would frighten my reader as I myself had been frightened that night!
Swift as light and as cheering was the idea that broke upon me. 'I have found it! What terrified me will terrify others; and I need only describe the spectre which had haunted me my midnight pillow.' On the morrow I announced that I had thought of a story. I began that day with the words, 'It was on a dreary night of November', making only a transcript of the grim terrors of my waking dream."
-Mary Wollstonecraft Shelley, from her introduction to Frankenstein
"When I placed my head upon my pillow, I did not sleep, nor could I be said to think... I saw -- with shut eyes, but acute mental vision -- I saw the pale student of unhallowed arts kneeling beside the thing he had put together. I saw the hideous phantasm of a man stretched out, and then, on the working of some powerful engine, show signs of life, and stir with an uneasy, half-vital motion. Frightful must it be; for supremely frightful would be the effect of any human endeavor to mock the stupendous Creator of the world.
...I opened mine in terror. The idea so possessed my mind, that a thrill of fear ran through me, and I wished to exchange the ghastly image of my fancy for the realities around. ...I could not so easily get rid of my hideous phantom; still it haunted me. I must try to think of something else. I recurred to my ghost story -- my tiresome, unlucky ghost story! O! if I could only contrive one which would frighten my reader as I myself had been frightened that night!
Swift as light and as cheering was the idea that broke upon me. 'I have found it! What terrified me will terrify others; and I need only describe the spectre which had haunted me my midnight pillow.' On the morrow I announced that I had thought of a story. I began that day with the words, 'It was on a dreary night of November', making only a transcript of the grim terrors of my waking dream."
-Mary Wollstonecraft Shelley, from her introduction to Frankenstein