Mary Roberts Rinehart

“ Jamieson got up and paced the floor, his hands behind him.
"There is something else that puzzles me," he said, stepping before me. "Who and what is the woman Nina Carrington? If it was she who came here as Mattie Bliss, what did she tell Halsey that sent him racing to Doctor Walker's, and then to Miss Armstrong? If we could find that woman we would have the whole thing."
"Mr. Jamieson, did you ever think that Paul Armstrong might not have died a natural death?" ”

“ I went up with him myself, but he only looked around."
Mr. Jamieson smiled.
"Good for you!" he applauded. "Don't allow any one in the house that you don't trust, and don't trust anybody. All are not electricians who wear rubber gloves." ”

“ She came to the office late, and the doctor was out. She waited around, walking the floor and working herself into a passion. When the doctor didn't come back, she was in an awful way. She wanted me to hunt him, and when he didn't appear, she called him names; said he couldn't fool her. There was murder being done, and she would see him swing for it.
"She struck me as being an ugly customer, and when she left, about eleven o'clock, and went across to the Armstrong place, I was not far behind her. She walked all around the house first, looking up at the windows. ”