Miss Greenfield, whose wonderful vocal powers have been astonishing the musical world recently, is to give a concert at Mechanic Hall, in Salem, this evening. Her programme will be found in another column. On her first appearance in Boston, she was labouring under severe indisposition, contracted at the burning of the Hampden House, in Springfield, where she was boarding at the time of its destruction. Salem Advertiser, February 10, 1852. We heard the Black Swan, as she is called, at the City Hall last Saturday evening. We have only three things to say of her performance: The first is, that she had an excellent house, composed of the most intelligent and enlightened of our citizens. The second, that all who heard her seemed to be exceedingly well pleased with her efforts. Although she does not claim to be, nor her friends on her behalf, that she is an artistic singer, yet the compass of her voice and the sweetness of her notes seemed to enchant every auditor. Our last observation is, that we were ourselves very much pleased with what we heard, and fully concurred in the justice of the loud applause so frequently bestowed on the occasion. Vox Populi, Lowell, February 13, 1852. The concert of Miss E. T. Greenfield, under the direction of the gentlemanly J. H. Wood, was one of the most successful that has been given to this city for a long time. From the great fame which had preceded the "Black Swan," had she not really proved herself what she is, a most remarkable vocalist, there would have been a strong feeling against all concerned; but there has not, within our knowledge, an entertainment of the kind taken place in this city that received such general applause. Her compass of voice is probably greater than that of Parodi, Catharine Hayes, or Jenny Lind, even; but she lacks the artistic power of either. Notwithstanding this deficiency, we presume to say that the audience were better pleased with her singing than they would have been with either of those named above, though perhaps some few would not be willing to acknowledge it. The Black Swan sounds twenty-eight full notes, a qualification accorded to no one before her; and one which most successfully rivals the powers of ventriloquism which Jenny Lind so successfully introduces in her echo song. Every piece she sung on Saturday evening was rapturously encored. The song in barytone was listened to with surprise and admiration, many of those present hardly believing it to proceed from her, so much did her deep, sonorous voice resemble that of a male. The second piece of the last part (sung instead of the first, which was loudly encored) and also the last piece, neither of which were on the programme, were enthusiastically applauded, and may be regarded as the best pieces sung: at least such is our impression. As we have already remarked, the concert may be pronounced the most successful ever given in this city. The instrumental part, by Professor