Complete the following sentence: Joe Zentner wrote of the origins of the advertising campaign on the Desert USA website in "Twenty Mule Teams on the move in Death Valley". Bill Parkinson, formerly a night watchman for the company, had to learn quickly how to drive the team when he was given the role of "Borax Bill". ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> <unk>
1904 St. Louis World's Fair was the maiden appearance for the team and was such a success that Parkinson went on tour.