I took the receiver into my hands.
"Who is there ?" I asked.
"Is that the apartment of Mr.Delora ?" was the reply.
"Yes!" I said.
"I wish to speak to Miss Felicia Delora," the voice said.
"Who are you ?" I asked.
"It does not matter," was the answer.

"Be so good as to tell her to come to the telephone--Miss Felicia Delora." I held the receiver away from me and turned to her.
"Some one wishes to speak to you," I said.
"Who is it ?" she asked.
"The person gave no name," I answered.
"Did you recognize the voice ?" she asked.
I hesitated.
"I was not sure," I said.

"It was like your uncle's." She took the instrument into her hand.

What passed between her and the person at the other end I had, of course, no means of telling.

All I know was that she said, at short intervals,--"Yes! No! Yes! I promise!" Then she laid the instrument down and looked at me.
"The mystery is solved," she said.