Harvey Riley, The Mule: A Treatise on the Breeding…
“ I have driven mules, single and double, night and day, from two to ten in a team, and have handled them in every way that it is possible to handle them, and have in my charge at this time two hundred of the best mule teams in the world, and there is not a span among them that could be forced over the road in four minutes. It is true of the mule that he will stand more abuse, more beating, more straining and constant dogging at him than any other animal used in a team. ”
