"I don't understand it yet; it seems like a bad dream," she said half to herself. "I don't want to understand it somehow ... I want to forget, I want to forget!"

"What do you want to forget?" asked Tarling.

She shook her head.

"Don't ask me," she said. "Please, please, don't ask me!"

He walked down the big stairway, a greatly worried man. He had left the taxi at the door. To his surprise he found the cab had gone, and turned to the porter.

"What happened to my taxi?" he said. "I didn't pay him off."

"Your taxi, sir?" said the head porter. "I didn't see it go. I'll ask one of the boys."

As assistant porter who had been in the street told a surprising tale. A gentleman had come up out of the murk, had paid off the taxi, which had disappeared. The witness to this proceeding had not seen the gentleman's face. All he knew was that this mysterious benefactor had walked away in an opposite direction to that in which the cab had gone, and had vanished into the night.

Tarling frowned.

"That's curious," he said. "Get me another taxi."