There are so many snarky comments that could apply. We'll go with someone looked in the box and left them. After all, where does one fence a set of Great Highland Pipes? Despite the price of a set. The odds of another piper happening by are somewhere between slim and none. That piper would also be well aware of the value of the box. Of course, the piper might cruise by in an hour or so to see if the set had been recovered. After all, one wouldn't want anything to happen to them.