Perhaps it is with Wagner that Ibsen should be grouped, rather than with Sophocles and Shakspere and Moliere. They are the two master-spirits of the stage in the nineteenth century. They are both of them consummate craftsmen, having assimilated every profitable device of their predecessors and having made themselves chiefs, each in his own art. And yet with all their witchery and all their power, we may doubt whether their work will resist the criticism of the twentieth century, because there is at the core of it an exaggeration or disproportion which the future is likely to perceive more and more clearly in the receding perspective of time. (1905.) THE ART OF THE STAGE-MANAGER As civilization becomes more and more complex, we can find more frequent instances of "specialization of function," as the scientists term it. Only a few years ago, engineering succeeded in getting itself recognized as one of the professions; and it has already split up into half a dozen branches, at least, and there are now not only civil engineers and mechanical engineers and mining engineers, but also electrical engineers--and even chemical engineers. The invention of the steel-frame building has brought into existence a special class of artizans known as "housesmiths," a word probably unintelligible to our British cousins. Sir Leslie Stephen, in his delightful 'Studies of a Biographer,' has a scholarly yet playful paper on the 'Evolution of the Editor'; and Mr. W.J. Henderson, in his interesting book on the 'Orchestra and Orchestral Music,' traces the development of the conductor--the musician whose duties are as important as they are novel, and who is not now expected to be able himself to play upon any particular instrument. "It is impossible to tell when the conductor made his appearance in music," Mr. Henderson asserts. "At the beginning of the seventeenth century, the conductor was at first nothing more than a leader; he was one of the performers whom the rest followed." An inscription in verse on an engraving of a conductor, published in Nuremberg, early in the eighteenth century, declares that "silent myself, I cause the music I control." In the nineteenth century, the conductor had won full recognition as an instrumentalist of a new type, who, without any instrument of his own, played on the whole body of musicians under his command. Of late, he has become so prominent in the eyes of the public, and his personality has been so insisted upon, that there is danger often lest he may distract attention from the music to himself. As Mr. Henderson records calmly: "We have beheld the curious spectacle of people going, to hear not Beethoven or Wagner, but Nikisch or Seidl."