In this strange retreat the doctor spent two years. Then suddenly, without warning, he was hurried hither and yon about the island, travelling under guard by automobile by night, and lying hidden by day in the houses of trusted German agents. He finally arrived at Mantanzas. Here, the man in whose house he was to stay hidden became fearful that he would be discovered there and the man himself get into desperate trouble. He, therefore, directed Dr. Scheele to a neighbouring hotel, but the doctor was unable to obtain accommodation, so that he spent the night sitting in a railroad station. Simultaneously another German of Havana was taken into custody. He was implicated in the Scheele affair by reason of his payments to the doctor, besides being involved in numerous violations of the neutrality of Cuba, for which the Cuban Government meant to hold him responsible. The close investigation of this man revealed much valuable data. A collection of papers had been buried by Dr. Scheele in the tropical garden he had built about the Pozas mansion. There they were unearthed by the agent of the Department of Justice of the United States who had gone to Cuba to bring him back. Taking a pick and shovel and digging among the flowers cherished by the doctor, he found these damning documents from Potsdam, containing their secret instructions for the working out of the industrial conquest of _Vereinigten Staaten_--These United States. Another set of documents was obtained by a very clever piece of work by agents of the Department of Justice. These were papers left behind by Wolf von Igel when he left the United States--papers that he dared not risk having seized and read by the British authorities on his way to Germany. They were packed in a suitcase and were committed to the care of a German in Englewood, New Jersey. On instructions from the head office of the Department of Justice in Washington, agents in the New York office of the Department wrote out in German, on a typewriter, the letter telling this German to deliver the suitcase to the bearer and including in its message the magic password. This letter was entrusted to an agent who spoke German perfectly.