"Look," I said. "I wish you'd get out and leave me alone. You want to know why I almost got killed last night?"
"Yes, I do," Golfin said. "That's something the police couldn't find out—in that other future, I mean."
"I'll tell you," I said. "I didn't know anything about Sarah Fish's place. I probably would never have gone there except for you. You bought a pack of cigarettes in the drugstore. Remember?"
Golfin blinked his eyes, then nodded.
"You paid for them with a three dollar bill."
"What is wrong with that?" Golfin asked.
"Nothing," I said slowly, "except that there aren't any three dollar bills."
"Oh dear me," Golfin said. "Of course there aren't. It completely slipped my mind!"
"I wanted one of those three dollar bills," I said. "The druggist wouldn't let me have the one you left, so I went to Sarah Fish's place to find you and get one."
A knock sounded at the door.