"I don't know. 'Pends how I meant to drown her."
"How would you drown her?"
"Go swimming with her and keep her head under."
"You'd have scratches that way, ten to one. Evidence."
"Not me. I'd catch her by the heels in shallow water and upend her. Just stand there and hold her till she drowned."
"Williams! What resource. And what ferocity."
"Well, how would you do it, sir?"
"I hadn't thought of aquatic methods. I mightn't be able to swim, or I mightn't like early-morning dips, or I might want to make a quick getaway from a stretch of water containing a body. No, I think I'd stand on a rock in deep water, wait till she came to talk to me, grip her head and keep it under. The only part of me that she could scratch that way would be my hands. And I'd wear leather gloves. It takes only a few seconds before she is unconscious."
"Very nice, sir. But you couldn't use that method anywhere within miles of the Gap."
"Why not?"