He did not hesitate a moment, but began ascending the stairs, still feeling his way with one hand against the wall and the other stretched out in the darkness before him. So he came at last to a little landing-place, and advancing slowly, his other hand presently touched the panels of a door. He fumbled for a second or two until he found the latch, then lifting it with a click, he entered. The bare, plastered passage-way through which he had come must have been the rear entrance to the apartments above, for, passing through the door, he found himself in what appeared to be a small dining-room, as well as he could see from the light that came from the stair-way beyond. It also seemed to be richly and luxuriously furnished, and he saw the multiple glimmering twinkle of the light in the passage-way beyond flickering upon polished silver and glass. But he had no time for observation, for before him he saw the figure which he followed just passing through the door upon the other side of the apartment, and he hurried forward without stopping. Beyond the dining-room he came out upon a broad landing-place of a stair-way, which upon the one hand led to the apartments above, and upon the other to the ground-floor beneath. The flitting, shadow-like figure of his mysterious guide crossed this landing-place to a door-way opposite, and as Oliver, without a moment's hesitation, followed, he found himself in a dressing-room. By the ruddy light of the fire that glowed cheerfully in the grate, he saw that the room was empty; the woman had evidently passed through the door-way upon the other side of the apartment, and so into the room beyond. Again Oliver hurried forward, and laid his hand upon the knob of the door. He tried it; the door was locked. A hat with a black feather lay upon the table; his eyes fell upon it, and then his heart leaped into his throat. It was the first spark of recognition, and then in a flash that recognition was complete: it was to the Count de St. Germaine's apartments that he had been led by this strange, silent guide. [Illustration: "'CÉLESTE!' BREATHED OLIVER THROUGH THE CRACK OF THE DOOR."] As Oliver stood there looking about him, a faint sound broke through the stillness--a dull, stifled, moaning cry. Again his heart bounded within him. He bent his head and listened at the crack of the door. Could he have been mistaken? He fancied that he heard a faint rustling in the room within, and then--yes, there could be no mistake this time! It was the sound of some one crying. "Céleste!" breathed Oliver through the crack of the door. No answer; even the faint rustling that he had heard had ceased. Oliver's heart throbbed as though it would stifle him; the blood hummed in his ears. "Céleste!" "Who is there?" answered a faint voice from within. That voice was sodden and husky with tears, but Oliver recognized it. For a moment or two, in the revulsion of his feelings, he turned giddy and faint. Then he began to cry.