MARY
O, John, that's what you said you wouldn't do.
JOHN
No. I said I'd do nothing to alter the past. And I won't. I'm too content, Mary. But this can't alter it. This is nothing.
MARY
What were you going to catch the train for, John?
JOHN
For London. I wasn't at the office then. It was a business appointment. There was a man who had promised to get me a job, and I was going up to...
MARY
John, it may alter your whole life!