“Not entirely for that reason. I had other work to do. Since I have been in London I have seen two more people⁠—a theatrical agent and a Harley Street doctor. From each of them I have got certain information. Put these things together, Mademoiselle, and see if you can make of them the same as I do.”

“I?”

“Yes, you. I will tell you one thing, Mademoiselle. There has been a doubt all along in my mind as to whether the robbery and the murder were done by the same person. For a long time I was not sure⁠—”

“And now?”

“And now I know .”

There was a silence. Then Katherine lifted her head. Her eyes were shining.