Agatha Christie: The Mysterious Affair at Styles

CHAPTER 3. THE NIGHT OF THE TRAGEDY (continued)

"Very well, then, have it your own way. I leave it in your hands. Though, if it is as we suspect, it seems a clear enough case. God forgive me if I am wronging him!"

I looked at my watch. It was six o'clock. I determined to lose no time.

Five minutes' delay, however, I allowed myself. I spent it in ransacking the library until I discovered a medical book which gave a description of strychnine poisoning.