The very thought had set fire to his indignation, he rose, and paced the room with a flush upon his ashen checks.

“I trust you, Ingram, just as I have always trusted you in the past,” he said, turning suddenly on his heel towards me. “You have a clever and trustworthy chief in Lord Barmouth, a man fully fitted to occupy the place I hold in the British Government; therefore, strain every nerve to thwart the machinations of our enemies. Otherwise there must be war before the year is out—there must be!”

“I shall do my utmost, rely upon me,” I answered. “It shall not be because of my want of enterprise that this base system of espionage is allowed to continue.”

“Good,” he said, offering me his hand. “Return to Paris to-night, resume your inquiries, and remember that in this affair you may be the means of saving your country from a war long and disastrous. There is a conspiracy against our beloved lady the Queen. That in itself is sufficient incentive to arouse to action any man in the Foreign Office. Remember it always while working at this inscrutable mystery.”

I took his thin, bony hand, and he gripped mine warmly. The secret of the great statesman’s popularity with all his staff, from ambassador down to fourth-grade clerk, was his personal contact with them, his readiness to consult and advise, and his unfailing friendship and courtesy.

I promised him that I would continue to do my utmost to discover the truth. Then, taking my leave, I went out and down the great staircase into Downing Street, where the dark afternoon was rendered the more cheerless by the rain falling heavily; and the solitary policeman in his dripping cape touched his hat respectfully as I passed. The outlook in every way was certainly a most dismal and oppressive one.

In obedience to the Marquess’ command, I returned to Paris by the night mail from Charing Cross. During that journey I reflected deeply upon the best course to pursue in solving the problem. But the enigma was difficult, and its solution beyond the efforts even of the ubiquitous Kaye and his associates. If I obtained leave of absence, and went down to the Riviera, was it at all probable that I could learn some clue from Edith? I was doubtful.

Ever since that night, three months ago, when I had followed the spies to that obscure hotel in the Rue des Petits Champs, they had been shadowed, and their doings reported. Wolf had been to Brussels and to Berlin, while Bertini had returned to London; but their actions, although sometimes suspicious, had never supplied us with the clue we wanted.

Bertini was at that moment, according to the reports of the special section at Scotland Yard, whose speciality it is to watch suspected secret agents in England, living in comfort at the Midland Hotel at St. Pancras Station. He usually passed his evenings with a few of his compatriots, playing dominoes at the Café Royal or the Café Monaco. Wolf, on the other hand, was travelling hither and thither visiting various people, all of whom were noted in the elaborate system of espionage which was now being exercised upon them.

After a week in Paris I consulted Lord Barmouth, and he agreed that it would be wise for me to travel to Bordighera and make a final attempt to obtain some fact from the woman whom I had once hoped to make my wife. Truth to tell, I made up my mind to travel South with great reluctance, for so false and untrue had she been that I had long ago resolved within myself never again to see her. But it was a matter of necessity that we should no longer remain in ignorance of the source of the information which constantly leaked out to our enemies; hence, one evening I busied myself in assisting Mackenzie to pack my bag. While doing so the electric bell rang suddenly, and when my servant returned from answering the summons, he announced a visitor, saying: