Mrs Warren's Profession has been performed at last, after a delay of only eight years; and I have once more shared with Ibsen the triumphant amusement of startling all but the strongest-headed of the London theatre critics clean out of the practice of their profession. No author who has ever known the exultation of sending the Press into an hysterical tumult of protest, of moral panic, of involuntary and frantic confession of sin, of a horror of conscience in which the power of distinguishing between the work of art on the stage and the real life of the spectator is confused and overwhelmed, will ever care for the stereotyped compliments which every successful farce or melodrama elicits from the newspapers.