"Liz!" he cried. "Liz, what's wrong?" He charged out of the room and I stood there, frozen, looking at the blood on the floor, where Donovan's bare feet had been gashed by the broken glass.

The woman screamed again, but this time the scream was muffled, as if she might be screaming with her mouth pressed against a pillow or a wall.

I blundered out of the kitchen into the dining-room, stumbling on something in my path — a toy, a stool, I don't know what it was and lunging halfway across the room to try to catch my balance, afraid of falling and hitting my head against a chair or table.

And I hit it again, that same resistant wall that I'd walked into down on the road. I braced myself against it and pushed, getting upright on my feet, standing in the dimness of the dining-room with the horror of that wall rasping at my soul.

I could sense it right in front of me, although I no longer touched it.

And whereas before, out in the open, on the road, it had been no more than a wonder too big to comprehend, here beneath this roof, inside this family home, it became an alien blasphemy that set one's teeth on edge.

"My babies!" screamed the woman. "I can't reach my babies!" Now I began to get my bearings in the curtained room. I saw the table and the buffet and the door that led into the bedroom hallway.

Donovan was coming through the doorway. He was half leading, half carrying the woman.

"I tried to get to them," she cried. "There's something there — something that stopped me. I can't get to my babies!" He let her down on the floor and propped her against the wall and knelt gently beside her. He looked up at me and there was a baffled, angry terror in his eyes.

"It's the barrier," I told him. "The one down on the road. It runs straight through the house."