So far as he could see there were two possibilities. One, much the more likely, was that the girl was an agent of the Thought Police, just as he had feared... But there was another, wilder possibility that kept raising its head, though he tried vainly to suppress it. This was, that the message did not come from the Thought Police at all, but from some kind of underground organization. Perhaps the Brotherhood existed after all! Perhaps the girl was part of it!