In Chapter One I may have challenged your credulity somewhat by stating that in his own time there probably existed anatomists of even greater potential genius than Leonardo de Vinci; however, they were not able to market their skills, and so were never heard of. If you did not close the book with a slam at that point, then you may still be with me. I would like to have begun this chapter with a statement appearing equally outrageous. Fearing a similar response, I must first prepare the ground.