"No, I couldn't do it, Watson," said he, as we reentered our room. "Once that warrant was made out, nothing on earth would save him. Once or twice in my career I feel that I have done more real harm by my discovery of the criminal than ever he had done by his crime. I have learned caution now, and I had rather play tricks with the law of England than with my own conscience. Let us know a little more before we act."
