...The steps fell lightly and oddly, with a certain swing, for all they went so slowly; it was different indeed from the heavy creaking tread of Henry Jekyll. Utterson sighed. "Is there never anything else?" he asked.
Poole nodded. "Once," he said. "Once I heard it weeping!"
"Weeping? How that?” said the lawyer, conscious of a sudden chill of horror.
"Weeping like a woman or a lost soul," said the butler. "I came away with that upon my heart, that I could have wept too."
-Robert Louis Stevenson, Dr. Jekyll & Mr. Hyde