The characteristics of Mme. Persiani's voice and art have already been generally described sufficiently to convey some distinct impression of her personality as a singer, but it is worth while to enter into some more detailed account of the peculiar qualities which for many years gave her so great a place on the operatic stage. Her acute soprano, mounting to E flat _altissimo_, had in it many acrid and piercing notes, and was utterly without the caressing, honeyed sweetness which, for example, gave such a sensuous charm to the voice of Mme. Grisi. But she was an incomparable mistress over the difficulties of vocalization. From her father, Tacchinardi, who knew every secret of his art, she received a full bequest of his knowledge. Her voice was developed to its utmost capacity, and it was said of her that every fiber in her frame seemed to have a part in her singing; there was nothing left out, nothing kept back, nothing careless, nothing unfinished. So sedulous was she in the employment of her vast and varied resources that she frequently rose to an animation which, if not sympathetic, as warmth kindling warmth, amounted to that display of conscious power which is resistless. The perfection with which she wrought up certain scenes, such as the "Sonnambula" _finale_ and the mad scene in "Lucia," judged from the standard of musical style, was not surpassed in any of the dazzling displays of the stage. She had the finest possible sense of accent, which enabled her to give every phrase its fullest measure. Groups of notes were divided and expressed by her with all the precision which the best violinists put into their bowing. The bird-like case with which she executed the most florid, rapid, and difficult music was so securely easy and unfailing as to excite something of the same kind of wonder with which one would watch some matchless display of legerdemain.