"After some time," von Hacklheber continues, "I learned, through some of our agents in the British Isles, that a man matching the general description of Lawrence Pritchard Waterhouse had been stationed to a castle in Outer Qwghlm. I was able to arrange for a young lady to place this man under the closest possible surveillance," he says dryly. "His security precautions were impeccable, and so we learned nothing directly. In fact, it is quite likely that he knew that the young woman in question was an agent, and so took added precautions. But we did learn that this man communicated through one-time pads. He would read his encrypted messages over the telephone to a nearby naval base whence they would be telegraphed to a station in Buckinghamshire, which would respond to him with messages encrypted using the same system of one-time pads. By going through the records of our various radio intercept stations we were able to accumulate a stack of messages that had been sent by this mysterious unit, using this series of one-time pads, over a period of time beginning in the middle of 1942 and continuing up to the present day. It was interesting to note that this unit operated in a variety of places: Malta, Alexandria, Morocco, Norway, and various ships at sea. Extremely unusual. I was very interested in this mysterious unit and so I began trying to break their special code."