The Horse and the Stag

AT ONE TIME the Horse had the plain entirely¹ to himself.  Then a
Stag intruded² into his domain³ and shared his pasture.  The Horse,
desiring to revenge himself on the stranger, asked a man if he
were willing to help him in punishing the Stag.  The man replied
that if the Horse would receive a bit in his mouth and agree to
carry him, he would contrive⁴ effective weapons against the Stag.
The Horse consented and allowed the man to mount him.  From that
hour he found that instead of obtaining revenge on the Stag, he
had enslaved himself to the service of man.