“Fear is incomplete knowledge”

“Our weapon is our knowledge. But remember, it may be a knowledge we may not know that we possess.”

“Sensationalism dies quickly, fear is long-lived.”

“It will prove, I fear, too Herculean a task for us.”

“She looked at nobody, but just before she went out, she raised her eyes and took a speedy glance at me. There was something in that looks that startled me - though it was difficult to describe why. There was malice in it, and a curious intimate knowledge. I felt that, without effort, and almost without curiosity, she had known exactly what thoughts were in my mind.”

“You should employ your little grey cells”

“I think a woman smothered in cheap scent is one of the greatest abominations known to mankind - Lord Mayfield”