Not until the smile faded, which was a matter of seconds, did he reach out in the dark and press the first of a row of buttons. There were three rows of such buttons. The concealed lighting that spilled from the huge bowl under the ceiling revealed a sleeping-porch, three sides of which were fine-meshed copper screen. The fourth side was the house wall, solid concrete, through which French windows gave access.

He pressed the second button in the row and the bright light concentered at a particular place on the concrete wall, illuminating, in a row, a clock, a barometer, and centigrade and Fahrenheit thermometers. Almost in a sweep of glance he read the messages of the dials: time 4:30; air pressure, 29:80, which was normal at that altitude and season; and temperature, Fahrenheit, 36°. With another press, the gauges of time and heat and air were sent back into the darkness.

A third button turned on his reading lamp, so arranged that the light fell from above and behind without shining into his eyes. The first button turned off the concealed lighting overhead. He reached a mass of proofsheets from the reading stand, and, pencil in hand, lighting a cigarette, he began to correct.

The place was clearly the sleeping quarters of a man who worked. Efficiency was its key note, though comfort, not altogether Spartan, was also manifest. The bed was of gray enameled iron to tone with the concrete wall. Across the foot of the bed, an extra coverlet, hung a gray robe of wolfskins with every tail a-dangle. On the floor, where rested a pair of slippers, was spread a thick-coated skin of mountain goat.