slightest objection. My own idea is that the best course would be to inject the anti-diphtheric serum this evening and call in a second opinion to-morrow morning."

Delay was what I required.

My frank response satisfied him, and he named Heston Forsyth, a very good man living in Cavendish Square. Therefore I promised to telephone an appointment with him.

I was eager to have a private chat with Mrs. Auberon, but to my dismay, discovered that she was out. She had gone out on a business message for her sick husband, and would not return before seven.

Having learnt this, I decided to come back at seven and inject the serum.

Had the woman repented? Did she fear lest I might give her away? I walked back to my surgery with mixed feelings of anger and disappointment. A note lay upon my table, and I opened and read it with satisfaction.

I had not, however, been indoors half an hour when a patient was announced, and on entering the waiting-room with my best professional smile, I found Mrs. Auberon.

"I came here, doctor," she exclaimed in a low, half-frightened voice when she was seated