"To-night."

"With what specific performance?"

"We want, we must without fail have, that doc.u.ment you took from the Brooke girl."

"Perhaps we had better continue in English. You are speaking a tongue unknown to me."

"Don't talk rot. You know well what I mean. We know you have the thing.

You didn't steal it to turn it over to England or the States. What is your price to Germany?"

"Whatever you have in mind, believe me when I say I have nothing to sell to the Wilhelmstra.s.se."

"But what else can you do with it? What other market--?"

"My dear Sophie, upon my word I haven't got what you want."

"Then why so keen to get the Brooke girl on the telephone as soon as you found out where she was stopping?"

"How did you learn about that, by the way?"

"Let the credit go to Senor Velasco. He saw you first."

"One thought as much.... Nevertheless, I haven't what you want."

"You gave it back to Miss Brooke?"

"Having nothing to give her, I gave her nothing."

The woman was silent throughout a round of the floor; then, "Tell me something," she requested.

"Can I keep anything from you?"

"Are you in love with the English girl?"

Lanyard almost lost step, then laughed the thought to derision. "What put that into your pretty head, Sophie?"

"Do you not know it yourself, my friend?"

"It is absurd."

She laughed maliciously. "Think it over. Possibly you have not stopped to think as yet. When you know the truth yourself, you will be the better qualified to fib about it. Also, you will not forget...."

"What?" he demanded bluntly as she paused with intention.

"That as long as she possesses the doc.u.ment--since you have it not--her life is endangered even more than yours."

"She hasn't got it!" Lanyard declared, as nearly in panic as he ever was.

"Ah!" the woman jeered. "So you confess to some knowledge of it after all!"

"My dear," he said, teasingly, "do you really want to know what has become of that paper?"

"I do, and mean to."

"What if I tell you?"

Her eyes lifted to his in childlike candour. "Need you ask?"

"You are irresistible.... Ask Karl."

She demanded sharply: "Whom?"

"Ekstrom."

"Ah!" Again the adventuress was silent for a little. "What does he know?"

"Ask him, enquire why he murdered von Harden, then what business took him to Ninety-fifth Street twice this evening--once about nine o'clock, again at midnight."

"You must be mad, monsieur. Karl would not dare...."

"You don't know him--or have forgotten he was trained in the International Bureau of Brussels, and there learned how to sell out both parties to a business that won't bear publicity."

"I wonder," the woman mused. "Never have I wholly trusted that one."

"Shall I give you the key?"

"If you love Karl as little as I...."

"But where do you suppose the good man is, this night of nights?"

"Who knows? He was not here when I arrived at midnight. I have seen nothing of him since."

"When you do--if he shows himself at all--look him over carefully for signs of wear and tear."

"Yes, monsieur? And in what respect?"

"Look for cuts about his head and hands, possibly elsewhere. And should he confess to an affair with a wind-shield in a motor accident, ask him what happened to the study window in the house at Ninety-fifth Street."

Impish glee danced in the woman's eyes. "Your handiwork, dear friend?"

"A mere beginning.... You may tell him so, if you like."

He was subjected to a convulsive squeeze. "Never have I felt so kindly disposed toward an enemy!"

"It is true, I were a better foe to Germany if I kept my counsel and let Ekstrom continue to play double."

The music ceasing, to be followed by the inevitable clamour for more, Lanyard offered an arm upon which Sophie rested a detaining hand.

"No--wait. We dance this encore. I have more to say."