Meanwhile, the doctor found himself fascinated by the items which had been removed from the female’s belt. There was a large black rectangle which had been attached by a looped cord to a smaller rectangle clipped on one shoulder of the orange vest. It had initially drawn his attention as it had been constantly giving off a faint hiss. He’d experimented with it, discovering that it had small knobs on the top which could be turned. As he gently floated it in front of his face, he debated whether or not he should be playing with it at all. It could help us understand how to treat the patient, he thought. Therefore, it is my duty to determine its purpose, if I am able. He gently twisted the leftmost knob.