Is there a limit to the capacity for a draught animal that engages in the heavy toil so assigned? Like the proverbial reed of hay which breaks the camel’s back, what is the limit, the absolute capacity, the outer stretches of what the psyche can absorb, the ultimate strain upon the human physical endurance and the will to survive; until the beast of burden crumples upon an exhausted heap of fatigue and loss of hope, a broken mass of bones, organic matter and mindless assemblage of shattered void?