Roll Back (ealên, eilô)
THE EALE (Yale) was a strange bull-like animal native to Aithiopia (Ethiopia) (sub-Saharan Africa). It was a hippo-sized beast equipped with the tusks of a boar and a set of rotating horns.
The creature's name was derived from the Greek words ealênand eilô"roll back," a reference to its moveable horns.
CLASSICAL LITERATURE QUOTES
Pliny the Elder, Natural History 8. 73 (trans. Rackham) (Roman encyclopedia C1st A.D.) :
"Aethiopia (Ethiopia) produces . . . many monstrosities : . . . Among the same people is also found the animal called the Eale (Yale), the size of a hippopotamus, with an elephant's tail, of a black or tawny colour, with the jaws of a boar and movable horns more than a cubit in length which in a fight are erected alternately, and presented to the attack or sloped backward in turn as policy directs."
- Pliny the Elder, Natural History - Latin Encyclopedia C1st A.D.