We will not pretend to say that "Die Walkuere" will ever be whistled about the streets, as the airs from "Das Pinafore" are whistled; the fact is, that no rendition of "Die Walkuere" can be satisfactory without the accompaniment of weird flashes of fire; and it is hardly to be expected that our youth will carry packages of lycopodium, and boxes of matches, around with them, for the sole purpose of giving the desired effect to any snatches from Herr Wagner's work they may take the notion to whistle. But in the sanctity of our homes, around our firesides, in the front-parlor, where the melodeon or the newly hired piano has been set up, it is there that Herr Wagner's name will be revered, and his masterpiece repeated o'er and o'er. The libretto is not above criticism; it strikes us that there is not enough of it. The probability is that Herr Wagner ran out of libretto before he had got through with his music, and therefore had to spread out comparatively few words over a vast expanse of music. The result is that a great part of the time the performers are on the stage is devoted to thought, the orchestra doing a tremendous amount of fiddling, etc., while the actors wander drearily around, with their arms folded across their pulmonary departments, and their minds evidently absorbed in profound cogitation. As for the music, the only criticism we have to pass upon it is that it changes its subject too often; in this particular it resembles the dictionary,--in fact, we believe "Die Walkuere" can be termed the Webster's Unabridged of musical language. Herr Wagner has his own way of doing business. He goes at it on the principle of the twelfth man, who holds out against the eleven other jurors, and finally brings them around to his way of thinking. For instance, in the midst of a pleasing strain in B natural, Herr Wagner has a habit of suddenly bringing out a small reed-instrument with a big voice (we do not know its name), piped in the key of F sharp. This small reed-instrument will not let go; it holds on to that F sharp like a mortgage. For a brief period the rest of the instruments--fiddles, bassoons, viols, flutes, flageolets, cymbals, drums, etc.--struggle along with an attempt to either drown the intruder, or bring it around to their way of doing business; but it is vain. Every last one of them has to slide around from B natural to F sharp, and they do it as best they can. Having accomplished its incendiary and revolutionary purpose, the small reed-instrument subsides until it finds another chance to break out. It is a mugwump.