Sir George Burnwell

He is one of the most dangerous men in England — a ruined gambler, an absolutely desperate villain, a man without heart or conscience. (Sherlock Holmes)
“He is older than Arthur, a man of the world to his finger-tips, one who had been everywhere, seen everything, a brilliant talker, and a man of great personal beauty. Yet when I think of him in cold blood, far away from the glamour of his presence, I am convinced from his cynical speech and the look which I have caught in his eyes that he is one who should be deeply distrusted.” (Alexander Holder)