Dear Sir:
We are pleased to learn of your successful negotiation of the business at hand. Be pleased to send us an early sample. As regards the other matter in hand I do not know how useful it will be to us: In any case my firm is not willing to pay you more than 100 in this case.
It was unsigned.
While reading, Sir Anderson held the five ten-pound notes in his hand. Upon finishing he began a vigorous indictment which in substance he declaimed in this way.
"On the face of it, this letter does not seem suspicious. But if you gentlemen will recall the times of Prince Charles' insurrections, periods whenever intrigues were going on, you will remember that in communications of this sort a government was always referred to as a 'firm.' If this was an honest business letter why was it enclosed in the envelope stationery of a company that knew nothing about it? Why was this letter unsigned? Why was cash enclosed, with it? What was his firm willing to pay 100 pounds for? Gentlemen, the reasons for all these things are obvious."
But the letter puzzled not only the court, the jury, the newspapers, but all England. For the first time I shall now explain it:
It was from the German government. By the "business at hand" they meant a new explosive and slow-burning powder that was to be used in the new type of fourteen-inch turret guns being made in Glasgow. Some of that explosive was in my possession. The fact that it was not discovered in my effects, nor was anything else incriminating found on me is because the Secret Agent who knows his business leaves nothing about; but he "plants" things, that is to say, leaves them in a safe deposit vault with the key in the hands of a person with power of attorney.
By the "sample" in the letter was meant a sample of the explosive. The "other business at hand" was spoken of as of tremendous importance, more vital to the safeguards of Britain than the other points mentioned in the letter.
There were sub-agents working at Cromarty. I did not know who they were; they simply made their reports to me, signing their German Secret Service number. I took up their points with Berlin. Well, the "other business in hand" was to put a certain British army officer under a monthly retaining fee of 100£ for which in the event of war he was to commit an act of unspeakable treason and treachery on a certain harbor defense.
I had judged my jurymen right, for they were very little impressed by this letter. It was all too vague and even the fluent language of a Crown Prosecutor does not impress a hard-headed Scotchman. I was feeling in high spirits indeed, when I saw one of the attendants approach Sir Anderson and deliver a document that had been handed into court. I at once recognized it and my heart dropped into my shoes. The Solicitor General read the document and smiled. I knew they had me.