“How do matters stand with the commander and lieutenant respectively? Can nothing at all be expected from them? Reserve officers are no use. They do not procure any valuable secrets because they do not have access to them. Confidential books and reports are what is wanted, and what you must procure at all costs if our relations are to continue.”

Sir Rufus Isaacs stated, and the evidence proved, that a man named Tobler, who did not visit England, kept Schulz supplied with money. A number of telegrams were produced, written in code, of which the prosecution had found the key. The deciphered telegrams read: “In greatest danger. Wire immediately 50 pounds.”

“In greater trouble and danger. All prepared for departure. Wire immediately 50 pounds and date of meeting.” Instructions from Tobler to Schulz included a list of questions which Schulz was to put to Mr Duff, and the list included the following:

I. Are officers or men granted leave, or have those on leave possibly been recalled?

II. Is there any sign of coals, stores, ammunition, etc, being accumulated?

III. What is the feeling in naval circles?

IV. How do officers and men discuss the situation?

V. Are crews being increased, are ships being prepared, or has commissioning of ships suddenly taken place?

These questions, the Attorney-General pointed out, were intended as tests for Mr Duff. Other questions, put apparently with more serious intent, included the following:

I. What is the opinion of officers of the British Navy as to the result of war between England and France, on the one hand, and Germany on the other, and the likelihood of the same over the Morocco question?