He stopped, walked over to the mirror and moved about until he could see me in it.

"Harold K. Jones," he said. "You've got the face I shave every morning, but I've only just recognized you. You're me."

"I prefer to think you are me," I said.

"So you did fail that final pharmacology exam, eh? And I didn't, in my probability. Well, well. I must admit it seemed more probable I would fail at the time, but I passed."

"It was that tramp Kate's fault. She said yes too easily."

He coughed and looked at his fingers. "She said no to me. And, as a matter of fact, after I passed I married her. She's my wife."

"I'm sorry. I meant nothing personal."

"You never married?"

"I never really got over Kate," I said.

"I wonder what would have happened if I had qualified and then not married her."