Markets in Everything, Prohibition Era: Cow Shoes
From a newspaper article in 1922 titled "[Moon]Shiners Wear 'Cow Shoes'":
"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 front 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."
HT: Kottke.org via Fred Dent