The Silent Isle by A.C. Benson

I have had a night of strange and terror-haunted dreams. Yesterday I was forced to work at full speed, feverishly and furiously for a great many hours, at a piece of work that admitted of no delay. By the evening I was considerably exhausted, yet the work was not done. I slept for an hour, and then settled down again and worked very late in the night, until it was finished. Such a strain cannot be borne with impunity, and I never do such a thing except under pressure of absolute necessity. I suppose that I contrived to inflame some delicate tissue of the brain, as the result was a series of intensely vivid dreams, with a strange quality of horror about them. It was not so much that the incidents themselves were of a dreadful type, but I was overshadowed by a deep boding, a dull ache of the mind, which charged everything that I saw with a sense of fortuitous dismay.

I woke in that painful mood in which the mind is filled with a formless dread; and the sensation has hung about me, more or less, all day.