Mr. William Archer has pointed out that Ibsen in 'Little Eyolf,' has for once failed to perceive the strict limitation of the stage when he introduced a flagstaff, with the flag at first at half-mast, and a little later run up to the peak. Now, there are no natural breezes in the theater to flutter the folds of the flag, and every audience is aware of the fact. This, then, is the dilemma: either the flag hangs limp and lifeless against the pole, which is a flat spectacle, or else its folds are made to flutter by some concealed pneumatic blast or electric fan, which instantly arouses the inquiring curiosity of the audience. Here we find added evidence in support of Herbert Spencer's invaluable principle of Economy of Attention, which he himself applied only to rhetoric, but which is capable of extension to all the other arts--and to no one of them more usefully than to the drama. At any given moment a spectator in the theater has only so much attention to bestow upon the play being presented before his eyes, and if any portion of his attention is unduly distracted by some detail--like either the limpness or the fluttering of a flag--then he has just so much less to give to the play itself. Very rarely, indeed, can we catch Ibsen at fault in a technical detail of stage-management; he was extraordinarily meticulous in his artful adjustment of the action of his social dramas to the picture-frame stage of our modern cosmopolitan theater. He was marvelously skilful in endowing each of his acts with a background harmonious for his characters; and nearly always was he careful to refrain from the employment of any scenic device which might attract attention to itself. He eschewed altogether the more violent spectacular effects, altho he did call upon the stage manager to supply an avalanche in the final act of 'When the Dead Awaken'; but even this bold convulsion of nature was less incongruous than might be expected, since it was not exhibited until the action of the play itself was complete. In fact, the avalanche might be described as only a pictorial epilog. III The principle of sternly economizing the attention of the audience can be violated by distractions far less extraneous and far less extravagant than avalanches. When Marmontel's forgotten tragedy of 'Cleopatra' was produced in the eighteenth century at the Théâtre Français, the misguided poet prevailed upon Vaucanson to make an artificial asp, which the Egyptian queen coiled about her arm at the end of the play, thereby releasing a spring, whereupon the beast raised its head angrily and emitted a shrill hiss before sinking its fangs into Cleopatra's flesh. At the first performance a spectator, bored by the tediousness of the tragedy, rose to his feet when he heard the hiss of the tiny serpent: "I agree with the asp!" he cried, as he made his way to the door.