“I shall not forget.”

She sighed. “It is all so mysterious. I fear perhaps it is just a game, and I shan’t ever see you again.”

He quoted a Spanish proverb.

“Oh, are you foreign?” she exclaimed, as though that explained all.

“No, child, but I have been much in foreign lands.”

“How exciting!” she said. “Tell me about it.”

But a large figure stood in the entrance to the alcove, and a pleasant voice said: “Mistress Pink Domino, will you give your hand to a Grey one?”

L’Inconnu came to his feet, and bowed gracefully. “I surrender you,” he said. “But only for a little while.”

Sir Anthony held out his arm to Miss Grayson, and looked curiously at the Black Domino.

Miss Grayson went reluctantly, saying over her shoulder: “I believe you will disappear.”