The Dunwich Horror by H. P. Lovecraft

In the spring after this event Old Whateley noticed the growing number of whippoorwills that would come out of Cold Spring Glen to chirp under his window at night. He seemed to regard the circumstance as one of great significance, and told the loungers at Osborn’s that he thought his time had almost come.

Asleep in Armageddon by Ray Bradbury

He sat down and cried. He sobbed until his lungs ached. He cried very hard and long. Tears ran down his cheeks and into his upraised, trembling fingers. “God, God, help me, oh God, help me,” he said.

The Purple Cloud by M. P. Shiel

I went out from that building that morning feeling like a man bowed down with age, for the depths of unutterable horror into which I had had glimpses during that one night made me very feeble, and my steps tottered, and my brain reeled.