"I'm afraid there's some mistake," he began. "I have probably found the wrong Mrs. Rider—I wanted to see Miss Odette Rider."
The lady nodded.
"That is my daughter," she said. "Have you any news of her? I am quite worried about her."
"Worried about her?" said Tarling quickly. "Why, what has happened? Isn't she here?"
"Here?" said Mrs. Rider, wide-eyed. "Of course she is not."
"But hasn't she been here?" asked Tarling. "Didn't she arrive here two nights ago?"
Mrs. Rider shook her head.
"My daughter has not been," she replied. "But she promised to come and spend a few days with me, and last night I received a telegram—wait a moment, I will get it for you."
She was gone a few moments and came back with a little buff form, which she handed to the detective. He looked and read:
"My visit cancelled. Do not write to me at flat. I will communicate with you when I reach my destination."