Fantastic Fablesby Ambrose Bierce
The Circular Clew
A DETECTIVE searching for the murderer of a dead man was accosted by a Clew.
"Follow me," said the Clew, "and there's no knowing what you may discover."
So the Detective followed the Clew a whole year through a thousand sinuosities, and at last found himself in the office of the Morgue.
"There!" said the Clew, pointing to the open register.
The Detective eagerly scanned the page, and found an official statement that the deceased was dead. Thereupon he hastened to Police Headquarters to report progress. The Clew, meanwhile, sauntered among the busy haunts of men, arm in arm with an Ingenious Theory."