“Your nerve, Walters? I should not have thought you had a nerve in your body.”

“Well, sir, it’s this lonely, silent house and the queer thing in the kitchen. Then when you tapped at the window I thought it had come again.”

“That what had come again?”

“The devil, sir, for all I know. It was at the window.”

“What was at the window, and when?”

“It was just about two hours ago. The light was just fading. I was sitting reading in the chair. I don’t know what made me look up, but there was a face looking in at me through the lower pane. Lord, sir, what a face it was! I’ll see it in my dreams.”

“Tut, tut, Walters. This is not talk for a police-constable.”