He switched off the bedside lamp and closed his eyes in the foreign darkness.

He heard, or thought he heard, a distant humming … barely audible over the whisper of his own breath. The sound of faraway, buried machinery. Night work at a factory underground. Or, more likely, the sound of his imagination. When he tried to focus on it it vanished into the ear’s own night noises, tinnitus and the creaking of small bones. Like every house, Tom thought, this one must move and sigh with the pulse of its heat and the tension of its beams.

Surrounded by the dark and the buzzing of his own thoughts, he fell asleep at last.

The dream came to him after midnight but well before dawn —it was three a.m. when he woke and checked his watch.

The dream began conventionally. He was arguing with Barbara, or bearing the brunt of one of her arguments. She had accused him of complicity in some sweeping, global disaster: the warming of the earth, ocean pollution, nuclear war. He protested his innocence (at least, his ignorance); but her small face, snub-nosed, lips grimly compressed, radiated a disbelief so intense that he could smell the rising odor of his own guilt.

But this was only one more variation of what had become the standard Barbara dream. On another night it might have ended there. He would have come awake drenched in the effluvia of his own doubt; would have rinsed his face with cold tap water and staggered back to bed like a battle-fatigued foot soldier slogging to the trenches.

Tonight, instead, the dream dissolved into a new scenario. Suddenly he was alone; he was in a house that was like this house, but bigger, emptier; he was lying on his back in a room with a single high window. There was a diffuse moonlight that illuminated only his bed and left the margins of the room in cavernous darkness.