In one of his letters [to the king] he wrote: “once the sun has gone down and we are finally alone together, my cock shall greet you like a gentleman greets a king - with a noble upright posture and a bared head.” Next to this paragraph he had drawn an erect penis with the foreskin drawn back, with an arrow pointed at the exposed glans penis. Modern historians have drawn no definitive conclusions of what he meant by this.