Chapter 17 THE STORY OF ALI MOHAMMED

Saluting each of the three in turn, the tall Egyptian passed from Dr. Cairn's room. Upon his exit followed a brief but electric silence. Dr. Cairn's face was very stern and Sime, with his hands locked behind him, stood staring out of the window into the palmy garden of the hotel. Robert Cairn looked from one to the other excitedly.

"What did he