Mezue ahịrịokwu na-esonụ: Joe Zentner dere banyere mmalite nke mgbasa ozi mgbasa ozi na ebe nrụọrụ weebụ Desert USA na "Twenty Mule Teams on the move in Death Valley". Bill Parkinson, onye bụbu onye nche abalị maka ụlọ ọrụ ahụ, aghaghị ịmụta ngwa ngwa otú e si akwọ ụgbọ ahụ mgbe e nyere ya ọrụ nke "Borax Bill". Ọ bụ ya bụ onye mbụ, ma ọ bụghị onye ikpeazụ, ọkwọ ụgbọala a maara aha ahụ. Ihe
1904 St. Louis World's Fair bụ ọbịbịa mbụ nke ndị otu ahụ ma nwee ihe ịga nke ọma nke na Parkinson gara njem.