e landed in the snow a quarter of a mile from one of the gates. We left the plane and plunged into the darkness. It was a steady upward slope. A packed snowfield was under foot, firm enough to hold our shoes, with a foot or so of loose soft snow on its top. The falling flakes whirled around us. The darkness was solid, Our helmeted leather-furred flying suits were soon shapeless with a gathering white shroud. We carried our Essens in our gloved hands. The night was cold, around zero I imagine, though with that biting wind it felt far colder.

From the gloom a tiny spot of light loomed up.

"There it is, Alan. Easy now! Let me go first." The wind tore away my words. We could see the narrow rectangle of bars at the gate, with a glow of light behind them.

"Hide your gun, Alan." I gripped him. "Hear me?"

"Yes."

"Let me go first. I'll do the talking. When he opens the gate, let me handle him. You—if there are two of them—you take the other."

We emerged from the darkness, into the glow of light by the gate. I had the horrible feeling that a shot would greet us. A challenge came, at first in French, then in English.

"Stop! What do you want?"