"Thank you, Madame," he said, taking the passport from her. He cleared his throat. "But what I really desire is a little information."

"Information?"

The Commissary nodded his head slowly.

"About a lady who has been a fellow-passenger of yours. You lunched with her yesterday."

"I am afraid I can't tell you anything about her. We fell into conversation over our meal, but she is a complete stranger to me. I have never seen her before."

"And yet," said the Commissary sharply, "you returned to her compartment with her after lunch and sat talking for some time?"

"Yes," said Katherine; "that is true."

The Commissary seemed to expect her to say something more. He looked at her encouragingly.

"Yes, Madame?"

"Well, Monsieur?" said Katherine.