And this woman's other friends! Do you know, for instance, where she often spends the week-end? At the country-place of one Bryan Mowbury, whose name used to be Bernhard Marburg, a very old hand indeed in the German Secret Service. She has identified herself right and left with the German espionage service in this country.
One day she lunches with a woman spy, whose lover was caught and shot by the French. Then she goes out motoring with...""But why in Heaven's name are all these people allowed to run loose?" broke in Desmond. "Do you mean to say you can't arrest them?""Arrest 'em? Arrest 'em? Of course, we can arrest 'em. But what's the use? They're all small fry, and we have to keep out a few lines baited with minnows to catch the Tritons. None of 'em can do any harm: we watch 'em much too closely for that. Once you've located your spy, the battle's won. It's when he--or it may be a she--is running loose, that I get peeved!"The Chief sprang impatiently to his feet and strode across the smoking-room, which was all but empty by this time, to get a match from a table. He resumed his seat with a grunt of exasperation.
"I can't see light, Okewood!" he sighed, shaking his head.
"But is this all you've got against Nur-el-Din?" asked Desmond.
"No," answered the other slowly, "it isn't. If it were, I need not have called you in. We would have interned or deported her.
No, we've traced back to her a line leading straight from the only member of the new organization we have been able to lay by the heels.""Then you've made an arrest?"
The Chief nodded.
"A fortnight ago... a respectable, retired English business man, by name of Basil Bellward... taken with the goods on him, as the saying is...""An Englishman, by Jove!"
"It's hardly correct to call him an Englishman, though he's posed as an English business man for so long that one is almost justified in doing so. As ,a matter of fact, the fellow is a German named Wolfgang Bruhl and it is my belief that he was planted in this country at least a dozen years ago solely for the purpose of furnishing him with good, respectable credentials for an emergency like this.""But sorely if you found evidence of his connection with this gang of spies, it should be easy to get a clue to the rest of the crowd?""Not so easy as you think," the Chief replied. "The man who organized this system of espionage is a master at his craft. He has been careful to seal both ends of every connection, that is to say, though we found evidence of Master Bellward-Bruhl being in possession of highly confidential information relating to the movements of troops, we discovered nothing to show whence he received it or how or where he was going to forward it. But we did find a direct thread leading straight back to Nur-el-Din.""Really," said Desmond, "that rather complicates things for her, doesn't it?""It was in the shape of a letter of introduction, in French, without date or address, warmly recommending the dancer to our friend, Bellward.""Who is this letter from?"