"Well," he went on, "after another month had passed, Kirk returned from Germany, where he had been upon a secret mission for the Government, and then he urged me to exercise the greatest care. A very clever German agent, by name Max Leftwich, who had resided in London for some years, had been instructed to obtain my secret at all hazards. Kirk warned me that he was a man of remarkable tact and ability, and that under his control were fully a dozen agents rendering him assistance. It was he who had obtained for his employers in Berlin the secret of our new submarine boat, and who had controlled the survey of the Suffolk coast in view of the coming invasion. I confess that I laughed at Kirk's fears--fears which were repeated to me by one of the Lords of the Admiralty only a week later. I saw no reason, however, for any serious apprehension. My laboratory was always locked, and could not be entered either from the skylight or conservatory, while the only keys of those double doors were secure upon my chain. But, alas! I had, like many another man, foolishly lulled myself into a sense of false security." And he sighed as he again paused. CHAPTER THIRTY. I DISCOVER MUCH THAT IS AMAZING. "Well," continued the dark-eyed man, "the rude awakening came in the following way. The thirteenth of January was on Sunday. Kirk, who had been engaged in watching the movements of the secret agent Leftwich, sent me a telegram telling me to leave for Edinburgh at 11:30 that evening, and asking me, if I intended to carry out this suggestion, to raise and lower the drawing-room blind three times at a quarter past five. By that I knew that the German agent and his friends had some desperate game afoot and that Kirk, astute and active, intended to prevent them carrying out their object." "If anyone obtained access to the laboratory, then, they could steal the secret?" I asked. "They could obtain specimens of the steel which might be analysed," he said. "And these specimens, in conjunction with the written results of my experiments, kept in the safe here, in this room, would, of course, place my process in their hands." "Then you were acting in obedience with Kirk's suggestion," I said. "He wished you to go to Scotland out of the way, eh?" "Exactly. He had previously been ordered by the Government to keep watch over me, for it was known by the Intelligence Department that Germany would make a desperate attempt to obtain the secret of what, to them, would be a most valuable process in the preparation of steel for use in their new navy." "And you made the signal to Kirk?"