The judgment of the musical critics, though not intemperate in praise, had something more than a touch of the public enthusiasm. "It is wanting in that roundness and mellowness which belongs to organs of the South," observed a very able musical connoisseur. "When forced, it has by no means an agreeable sound, and falls hard and grating on the ears. It is evident that, in the greater part of its range, acquired by much perseverance and study, nature has not been bountiful to the Swedish Nightingale in an extraordinary degree. But art and energy have supplied the defects of nature. Perhaps no artist, if we except Pasta, ever deserved more praise than Jenny Lind for what she has worked out of bad materials. From an organ neither naturally sweet nor powerful, she has elaborated a voice capable of producing the most vivid sensations. In her mezzo-voce singing, scarcely any vocalist we ever heard can be compared to her. The most delicate notes, given with the most perfect intonation, captivate the hearers, and throw them into ecstasies of delight. This is undoubtedly the great charm of Jenny Lind's singing, and in this respect we subscribe ourselves among her most enthusiastic admirers.... She sustains a C or D in alt with unerring intonation and surprising power. These are attained without an effort, and constitute another charm of the Nightingale's singing. "In pathetic music Jenny Lind's voice is heard to much advantage. Indeed, her vocal powers seem best adapted to demonstrate the more gentle and touching emotions. For this reason her solo singing is almost that alone in which she makes any extraordinary impression. In ensemble singing, excepting in the piano, her voice, being forced beyond its natural powers, loses all its beauty and peculiar charm, and becomes, in short, often disagreeable.... Her voice, with all its charm, is of a special quality, and in its best essays is restricted to a particular class of lyrical compositions.... As a vocalist, Jenny Lind is entitled to a very high, if not the highest, commendation. Her perseverance and indomitable energy, joined to her musical ability, have tended to render her voice as capable and flexible as a violin. Although she never indulges in the brilliant flights of fancy of Persiani, nor soars into the loftiest regions of fioriture with that most wonderful of all singers, her powers of execution are very great, and the delicate taste with which the most florid passages are given, the perfect intonation of the voice, and its general charm, have already produced a most decided impression on the public mind. By the musician, Persiani will be always more admired, but Jenny Lind will strike the general hearer more."