This is clever — during Prohibition, moonshiners wore shoes that left hoofprints. From the St. Petersburg, Fla., Evening Independent, May 27, 1922:

A new method of evading prohibition agents was revealed here today by A.L. Allen, state prohibition enforcement director, who displayed what he called a ‘cow shoe’ as the latest thing from the haunts of moonshiners.

The cow shoe is a strip of metal to which is tacked a wooden block carved to resemble the hoof of a cow, which may be strapped to the human foot. A man shod with a pair of them would leave a trail resembling that of a cow.

“The shoe found was picked up near Port Tampa where a still was located some time ago. It will be sent to the prohibition department at Washington. Officers believe the inventor got his idea from a Sherlock Holmes story in which the villain shod his horse with shoes the imprint of which resembled those of a cow’s hoof.”

(Via Rare Historical Photos.)