"I seemed to stumble—" I said. There was nothing underfoot but the soft sand, and where I had flung my hand against a sort of railing, there was nothing either. We went back to the airship in silence, both of us confused.


After that, with increasing frequency, there would come interruptions, like iron bars striking dark, jagged holes in the tissue of life. From time to time I heard inexplicable noises—the whirring of motors, the skid-skid of tires on invisible streets, the rumble of carts around corners of a world where there were no carts. Again and again those moments of confusion would come over me, when I seemed to be looking into two worlds at once, one superimposed upon the other, one bright, the other dark with faint points of light in the distance. Once, walking along the corridor beyond my room in Richmond, I collided with a man. For a moment the corridor faded completely. I stood on a street with dark houses about me. Overhead was the glow of a street-lamp, and a milk-cart was just rattling away around a corner. A man with a frightened face stood before me, his hat on the pavement, his eyes staring. We looked at each other in astonishment. I started to speak. Then he reached for his hat quickly, and brushed by me, muttering close to my ear.

"For God's sake, look where you're going...."

I stood in the corridor again, staring. Down the corridor, coming toward me, was a single figure—Selda. Behind me there was nobody. I went to meet Selda, dazed and uneasy. I could still hear, close to my ear, an echo of that muffled, hoarse voice that I had never heard before.

That was two days before the end. We were leaving the city on that final bright morning, when a representative of the Bureau stopped us. I looked at him inquiringly.

"I have come to tell you, Baret," he said, "that your departure is scheduled for this evening." I drew back, startled, and looked at Selda.

"My departure?" I repeated in a low voice, hardly understanding. "So soon?" I had forgotten that one day I should have to leave.

"It has been arranged," he said impersonally.

We bowed slightly to each other, and he went away. Selda and I stepped aboard our ship in silence.