Pictures! Pictures! Pictures! Often, before I learned, did I wonder whence came the multitudes of pictures that thronged my dreams; for they were pictures the like of which I had never seen in real wake-a-day life. They tormented my childhood, making of my dreams a procession of nightmares and a little later convincing me that I was different from my kind, a creature unnatural and accursed.

The Works of Jack London. --: The call of the wild (ed. 1917)