The Czar's Spy by William le Queux

Throughout the long night I called many times at the hospital, but the reply was always the same. Jack had not regained consciousness, and the doctor regarded his case as hopeless.

In the morning I drove in hot haste to Bassett Road, Notting Hill, and at the address Olinto had given me found Muriel. When she entered the room with folding doors into which I had been shown, I saw that she was pale and apprehensive, for we had not met since her flight, and she was, no doubt, at a loss for an explanation. But I did not press her for one. I merely told her that the Italian Santini had given me her address and that I came as bearer of unfortunate news.