Certainly, even at a distance, her brother’s movements suggested to Marguerite that he was in danger of being seen. He cowered in the darkness, tried to avoid the circles of light thrown by the lamps in the passage. At all costs Marguerite felt that she must warn him that the way he was going now would lead him straight into Chauvelin’s arms, and she longed to let him know that she was close by.

Feeling sure that he would recognise her voice, she made pretence to turn back to the cubicle through the door of which the wardress had already disappeared, and called out as loudly as she dared:

“Good-night, citizeness!”

But Armand—who surely must have heard—did not pause at the sound. Rather was he walking on now more rapidly than before. In less than a minute he would be reaching the spot where Chauvelin stood waiting for Marguerite. That end of the corridor, however, received no light from any of the lamps; strive how she might, Marguerite could see nothing now either of Chauvelin or of Armand.

Blindly, instinctively, she ran forward, thinking only to reach Armand, and to warn him to turn back before it was too late; before he found himself face to face with the most bitter enemy he and his nearest and dearest had ever had. But as she at last came to a halt at the end of the corridor, panting with the exertion of running and the fear for Armand, she almost fell up against Chauvelin, who was standing there alone and imperturbable, seemingly having waited patiently for her. She could only dimly distinguish his face, the sharp features and thin cruel mouth, but she felt—more than she actually saw—his cold steely eyes fixed with a strange expression of mockery upon her.

But of Armand there was no sign, and she—poor soul!—had difficulty in not betraying the anxiety which she felt for her brother. Had the flagstones swallowed him up? A door on the right was the only one that gave on the corridor at this point; it led to the concierge’s lodge, and thence out into the courtyard. Had Chauvelin been dreaming, sleeping with his eyes open, whilst he stood waiting for her, and had Armand succeeded in slipping past him under cover of the darkness and through that door to safety that lay beyond these prison walls?

Marguerite, miserably agitated, not knowing what to think, looked somewhat wild-eyed on Chauvelin; he smiled, that inscrutable, mirthless smile of his, and said blandly:

“Is there aught else that I can do for you, citizeness? This is your nearest way out. No doubt Sir Andrew will be waiting to escort you home.”

Then as she—not daring either to reply or to question—walked straight up to the door, he hurried forward, prepared to open it for her. But before he did so he turned to her once again:

“I trust that your visit has pleased you, Lady Blakeney,” he said suavely. “At what hour do you desire to repeat it to-morrow?”