== Erich Gimpel == 

 Erich Gimpel, who was smuggled in the late fall of 1944 by submarine to the United States, claimed in his (partial) autobiography (German edition) that he had received some information about the Manhatan project and radioed to Germany. He claims that he received this information from a Nazi informant in New York. I'm not sure whether the presentation by Gimpel is reliable. (In contrast to the Quirin process the transcripts have not been published for Gimpel process online.)