She inclined her head. “Very well, sir. This part of the story is very hard to tell, for I do not wish to give you to understand that the Marquis — forced his attentions upon an unwilling female. My sister encouraged him, and led him to suppose that she was — that she — ”

“I comprehend perfectly, Miss Challoner.”

She threw him a grateful look. “Yes, sir. Well, the end of it was that the Marquis induced my sister to consent to fly with him. I discovered their assignation, which was for eleven o’clock one evening. I should explain that the billet his lordship sent my sister, appointing the hour, fell into my hands, and not hers. There were reasons, sir, into which I shall not drag you, which prevented me from informing my mother of this dreadful elopement. I need not tell you, sir, that his lordship did not contemplate marriage. It seemed to me that I must contrive not only to stop the actual flight, but to put an end to an affair that would only mean Sophia’s ruin. When I look back I marvel at my own simplicity. I conceived the notion of taking Sophia’s place in the coach, and when he discovered the imposture it was my intention to make him believe that Sophia and I had planned it between us, for a jest. I thought that nothing would more surely disgust him.” She paused, and added dryly: “I was quite right.”

The gentleman twisted the emerald ring on his finger. “Do I understand that you carried out this remarkable plan?” he inquired.

“Oh, yes, sir. But it went sadly awry.”

“That was to have been expected,” he said gently.

“I suppose so,” she sighed. “It was a silly plan. Lord Vidal did not discover the cheat until next morning, when we reached Newhaven. To find myself by the sea was a shock to me. I had not guessed that his lordship intended to leave England. I entered the inn on the quay in his company, and in the private room he had engaged I discovered myself to him.” She stopped.

“I can well imagine that Lord Vidal’s emotions baffle description,” said the gentleman.

She was looking straight in front of her. She nodded, and said slowly: “In what followed, sir, I do not wish to lay any blame on Lord Vidal. I played my part too well, not dreaming of the revenge he would take. I must have appeared to him — I did appear to him — a vulgar, loose female.” She turned her head towards him. “Are you acquainted with Lord Vidal, sir?”

“I am, Miss Challoner.”