Vernon Jones (1912)
152. THE WOLF AND THE SHEPHERD
A Wolf hung about near a flock of sheep for a long time, but made no attempt to molest them. The Shepherd at first kept a sharp eye on him, for he naturally thought he meant mischief: but as time went by and the Wolf showed no inclination to meddle with the flock, he began to look upon him more as a protector than as an enemy: and when one day some errand took him to the city, he felt no uneasiness at leaving the Wolf with the sheep. But as soon as his back was turned the Wolf attacked them and killed the greater number. When the Shepherd returned and saw the havoc he had wrought, he cried, "It serves me right for trusting my flock to a Wolf."
Aesop's Fables: A New Translation by V.S. Vernon Jones with illustrations by Arthur Rackham (1912). This book is available online at Project Gutenberg.