Vernon Jones (1912)
87. THE WILD BOAR AND THE FOX
A Wild Boar was engaged in whetting his tusks upon the trunk of a tree in the forest when a Fox came by and, seeing what he was at, said to him, "Why are you doing that, pray? The huntsmen are not out to-day, and there are no other dangers at hand that I can see." "True, my friend," replied the Boar, "but the instant my life is in danger I shall need to use my tusks. There'll be no time to sharpen them then."
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.