Why did you confess to a crime which you did not commit ?" Kent took time to light his cigar.

The girl watched him closely, almost eagerly.
"I may be mad," he said.

"It is possible for any human being to be mad and not know it.

That's the funny part about insanity.

But if I'm not insane, I killed Barkley; if I didn't kill him, I must be insane, for I'm very well convinced that I did.