She stayed his half-movement to the door. "You can't do that. I'll just go to another police station and confess and they'll send me on to you. I did it, you see!"
"Oh, no, you didn't."
"Why not?"
"For one thing, you weren't near the place."
"How do you know where I was?"
"You forget that in the course of conversation on Saturday night it was apparent that on Wednesday night you were at Miss Keats's house in Chelsea."
"I was only there for cocktails. I left early because Lydia was going to a party up the river."
"Even so, that makes it rather unlikely that you should be on a beach near Westover shortly after dawn next morning."
"It wouldn't be at all surprising if I were in the north of England next morning. I motored down if you want to know. You can inquire at my flat. The girl I live with will tell you that I didn't come home till lunchtime on Thursday."
"That hardly proves that your activities were murderous."