She signified assent with another nod; and on this he turned to an adjacent door, opened it gently, whipped out his flash-lamp, and passed through. Without sign of hesitancy, she followed; and like two shadows they dogged the dancing spot-light of the flash-lamp, through a linen-closet and service-room, down a shallow well threaded by a spiral of iron steps and, by way of the long corridor linking the kitchen-offices, to a stout door secured only by huge, old-style bolts of iron.

Thus, in less than two minutes from the instant of their encounter, they stood outside Troyon's back door, facing a cramped, malodorous alley-way—a dark and noisome souvenir of that wild mediaeval Paris whose effacement is an enduring monument to the fame of the good Baron Haussmann.

Now again it was raining, a thick drizzle that settled slowly, lacking little of a fog's opacity; and the faint glimmer from the street lamps of that poorly lighted quarter, reflected by the low-swung clouds, lent Lanyard and the girl little aid as they picked their way cautiously, and always in complete silence, over the rude and slimy cobbles of the foul back way. For the adventurer had pocketed his lamp, lest its beams bring down upon them some prowling creature of Popinot's; though he felt passably sure that the alley had been left unguarded in the confidence that he would never dream of its existence, did he survive to seek escape from Troyon's.

For all its might and its omniscience, Lanyard doubted if the Pack had as yet identified Michael Lanyard with that ill-starred Marcel who once had been as intimate with this forgotten way as any skulking tom of the quarter.

But with the Lone Wolf confidence was never akin to foolhardiness; and if on leaving Troyon's he took the girl's hand without asking permission and quite as a matter-of-course, and drew it through his arm—it was his left arm that he so dedicated to gallantry; his right hand remained unhampered, and never far from the grip of his automatic.

Nor was he altogether confident of his companion. The weight of her hand upon his arm, the fugitive contacts of her shoulder, seemed to him, just then, the most vivid and interesting things in life; the consciousness of her personality at his side was like a shaft of golden light penetrating the darkness of his dilemma. But as minutes passed and their flight was unchallenged, his mood grew dark with doubts and quick with distrust. Reviewing it all, he thought to detect something too damnably adventitious in the way she had nailed him, back there in the corridor of Troyon's. It was a bit too coincidental—"a bit thick!"—like that specious yarn of somnambulism she had told to excuse her presence in his room. Come to examine it, that excuse had been far too clumsy to hoodwink any but a man bewitched by beauty in distress.

Who was she, anyway? And what her interest in him? What had she been after in his room?—this American girl making a first visit to Paris in company with her venerable ruin of a parent? Who, for that matter, was Bannon? If her story of sleep-walking were untrue, then Bannon must have been at the bottom of her essay in espionage—Bannon, the intimate of De Morbihan, and an American even as the murderer of poor Roddy was an American!

Was this singularly casual encounter, then, but a cloak for further surveillance? Had he in his haste and desperation simply played into her hands, when he burdened himself with the care of her?

But it seemed absurd; to think that she… a girl like her, whose every word and gesture was eloquent of gentle birth and training…!

Yet—what had she wanted in his room? Somnambulists are sincere indeed in the indulgence of their failing when they time their expeditions so opportunely—and arm themselves with keys to fit strange doors. Come to think of it, he had been rather willfully blind to that flaw in her excuse…. Again, why should she be up and dressed and so madly bent on leaving Troyon's at half-past four in the morning? Why couldn't she wait for daylight at least? What errand, reasonable duty or design could have roused her out into the night and the storm at that weird hour? He wondered!