Then Sonny Martin, who is the perfection of tact and diplomacy--probably on that account he failed for the Diplomatic--chipped in with an anecdote about a man who was rating the waiter at an adjoining table, and I held my peace. But as Red Tabs rose to go, a little later, he held my hand for a minute in his and with that curious look of his, said slowly and with meaning: "When a nation is at war, officers on _active service_ must occasionally disappear, sometimes in their country's interest, sometimes in their own." He emphasised the words "on active service." In a flash my eyes were opened. How blind I had been! Francis was in Germany. CHAPTER II THE CIPHER WITH THE INVOICE Red Tabs' sphinx-like declaration was no riddle to me. I knew at once that Francis must be on secret service in the enemy's country and that country Germany. My brother's extraordinary knowledge of the Germans, their customs, life and dialects, rendered him ideally suitable for any such perilous mission. Francis always had an extraordinary talent for languages: he seemed to acquire them all without any mental effort, but in German he was supreme. During the year that he and I spent at Consistorial-Rat von Mayburg's house at Bonn, he rapidly outdistanced me, and though, at the end of our time, I could speak German like a German, Francis was able, in addition, to speak Bonn and Cologne _patois_ like a native of those ancient cities--ay and he could drill a squad of recruits in their own language like the smartest _Leutnant_ ever fledged from Gross-Lichterfelde. He never had any difficulty in passing himself off as a German. Well I remember his delight when he was claimed as a fellow Rheinländer by a German officer we met, one summer before the war, combining golf with a little useful espionage at Cromer. I don't think Francis had any ulterior motive in his study of German. He simply found he had this imitative faculty; philology had always interested him, so even after he had gone into the motor trade, he used to amuse himself on business trips to Germany by acquiring new dialects. His German imitations were extraordinarily funny. One of his "star turns", was a noisy sitting of the Reichstag with speeches by Prince Bülow and August Bebel and "interruptions"; another, a patriotic oration by an old Prussian General at a Kaiser's birthday dinner. Francis had a marvellous faculty not only of _seeming_ German, but even of almost looking like a German, so absolutely was he able to slip into the skin of the part.