"A GENTLEMAN to see you, Doctor." From across the common a clock sounded the half-hour. "Ten-thirty " I said. "A late visitor. Show him up, if you please." I pushed my writing aside and tilted the lamp-shade, as footsteps sounded on the landing. The next moment I had jumped to my feet, for a tall, lean man, with his square-cut, clean-shaven face sun-baked to the hue of coffee, entered and extended both hands, with a cry: