"Yes. God willing."

I left her sitting there and turned away. Migul slid the door open, letting in the hum and buzz of the machinery outside. But I saw that the attending Robots had all vanished. There was no mechanism of independent locomotion left.

Mary repeated, "Lock the door carefully upon me. Oh, George, come back to me!"

I essayed a smile and a nod as the door slid closed upon her.

"Is it locked, Migul?"

"Yes. Sealed."

"You are sure Tugh cannot open it? He did before."

"I have set my own lock-series. He will find it does not open."

"Show me how to open it."