Aesop,
Æsop's Fables: A New Translation…
(1912)
“ A CERTAIN man who had an Ass and a Mule loaded them both up one day and set out upon a journey. So long as the road was fairly level, the Ass got on very well: but by and by they came to a place among the hills where the road was very rough and steep, and the Ass was at his last gasp. So he begged the Mule to relieve him of a part of his load: but the Mule refused. ”
