I took good care not even to look round on my walk back to the hotel. I knew the “Italian” would be safely under the observation of Madame Gabrielle, and that I should get the information I wanted in good time. My spirits rose. I felt sure that at length I was on the right track.
Returning to the hotel, I volubly explained my dirty and dishevelled appearance in full hearing of a small crowd of idlers in the lounge. I did not know whether among them there might not be another agent of our enemies, and, by way of concealing my suspicions, I spoke warmly of the essentially Italian courtesy of my late antagonist. It came out afterwards that I had done a good stroke of work. The lounge did contain an enemy agent who was watching me, but so naturally was I able to speak that he actually reported that I had obviously not the smallest suspicion of the real calling of the mysterious “Italian.”
Until I received some word from Madame Gabrielle there was absolutely nothing that I could do, and I passed hour after hour in an inward fever of impotence and anxiety, though outwardly, I dare say, I was cool and unconcerned; one does not wear his heart upon his sleeve in the Secret Service! Dinner came and I ate with an appetite, well knowing that at any moment a call might come which would tax my physical and mental powers to the uttermost.
Having finished my dinner, the big Swiss porter came into the room and handed me a note, remarking in French: “This has just been brought by a boy, monsieur.”
Inside it I found a plain visiting-card of the size used by gentlemen. There was nothing else.
Here, indeed, was the call to action. That plain visiting-card was a signal from Madame Gabrielle that she was hot on the scent, but that either because she feared she might be under suspicion, or would not run the risk of her message falling into the wrong hands, she could not write a letter.
In any case it was an urgent call for urgent help. The hunt was up! Towards us, urged by the full power of her twin screws, a British liner was being driven at top speed by her giant engines; awaiting her, securely hidden in some sheltered spot I had yet to find, was one of the undersea assassins of our enemy. And the lives of two thousand men, women, and children were at stake. At last the hour for swift, dramatic action had come.
Certainly matters had now assumed a very critical aspect. I hurried out along the broad, tree-lined Paseo, where the moon was now shining brightly over the Bay of San Sebastian, to the Hôtel Continental. Here the gold-laced concierge told me that Madame Tavernier had left about an hour before.
“Did she say where she was going?” I inquired.
“Yes, to Santander,” replied the concierge; “the Hôtel Europa she gave as her address, so that we might forward her letters; she said she had not expected to leave so soon.”