Over by a 'doby stands a old fleabitten gray mare; she's shore hideous.
"Now if mules has one overmasterin' deloosion it's a gray mare; she's the religion an' the goddess of the mules.

This knowledge is common; if you-all is ever out to create a upheaval in the bosom of a mule the handiest, quickest lever is a old gray mare.

The gov'ment takes advantage of this aberration of the mules.

Thar's trains of pack mules freightin' to the gov'ment posts in the Rockies.

They figgers on three hundred pounds to the mule an' the freight is packed in panniers.