There was a sudden clatter. The receiver had been put back. Some one had interrupted her.

I tapped the little lever of the instrument repeatedly.

“Number, please,” a monotonous voice asked.

“What number was I talking to this instant?” I said, almost trembling with anxiety.

“I’m sure I don’t know. What number do you want?”

“The number I’ve been talking to.”

“I tell you I don’t know it,” replied the female operator.

“Can’t you find it out?”

“I’ll try. Hold the line, please.”

After a brief interval, the voice said—