Eileen O’Connor turned round eagerly to the President.

“I demand the production of that book.”

An orderly was sent to the lieutenant’s rooms to fetch it. It was clear that the President of the Court made a black mark against Franz von Kreuzenach for not having mentioned its discovery to the Court. As yet, however, he could not see the bearing of it on the case.

Then, with the book in her hand, Eileen O’Connor turned to the famous cryptogram, showed how it corresponded exactly with her own cypher, proved that the pieces of paper found in her rooms were copies of the Jules Verne cypher in the handwriting of her pupils.

“You see, Herr President!” she cried eagerly.

The President admitted that this was proved, but, as he asked, leaning forward in his chair, for what purpose had they copied out that cypher? Cyphers were dangerous things to write in time of war. Deadly things. Why did these ladies want to learn the cypher?

It was then that Eileen O’Connor was most brilliant. She described in a simple and girlish way how she and her pupils worked in their little room. While they copied freehand models, one of them read out to the others, books of romance, love, adventure, to forget the gloom of life and the tragedy of war. One of those books was Jules Verne’s “Cryptogram.” It had fascinated them. It had made them forget the misery of war. They were romantic girls, imaginative girls. Out of sheer merriment, to pass the hours, they had tried to work out the cypher. They had written love-letters to imaginary young men in those secret numbers. Here Eileen, smiling ironically, read out specimens of the letters that had been found.

“Come to the corner of the Rue Esquermoise at 9.45. You will know me because I shall be wearing a blue bow in a black hat.”

That was the romantic imagination of the Baronne de Villers-Auxicourt.

“When you see a lady standing outside the Jardin d’Eté, with a little brown dog, speak to her in French and say, ‘Comme il fait froid aujourd’hui, mademoiselle.’ If she answers, ‘Je ne vous comprends pas, monsieur,’ you will understand that she is to be trusted, and you must follow her.”