Everybody knows the mule is a stubborn creature, but Nobel Prize author William Faulkner of Mississippi saw other attributes as well. Shortly before he died, in 1962, Faulkner wrote a rollicking comedy entitled The Reivers and had this to say about the animal:
A mule which will gallop for a half-mile in the single direction elected by its rider even one time becomes a neighborhood legend; one that will do it consistently time after time is an incredible phenomenon. Because, unlike a horse, a mule is far too intelligent to break its heart for glory running around the rim of a mile-long saucer. In fact, I rate mules second only to rats in intelligence, the mule followed in order by cats, dogs, and horses last—assuming of course that you accept my definition of intelligence: which is the ability to cope with environment: which means to accept environment yet still retain at least something of personal liberty.