All really good orchestras must from the nature of the case be permanent ones, composed of players in receipt of regular salaries. Attendance at rehearsals is then taken as a matter of course, and no question of replacement by substitutes can be raised. The only English orchestra in which the conditions essential to a perfect _ensemble_ are to be found is the Manchester orchestra conducted by Sir Charles Hallé. A larger and better orchestra than the excellent one of Sir Charles Hallé is that of M. Lamoureux. Better even than the orchestra of M. Lamoureux is that of M. Colonne. But I have no hesitation in saying that M. Colonne's orchestra is surpassed in fineness and fulness of tone, as also in force and delicacy of expression, by the American orchestra of 150 players conducted by Mr. Theodore Thomas. The members of this orchestra are for the most part Germans, and the eminent conductor is himself, by race at least, a German. Putting aside, however, all question of nationality, I simply say that the orchestra directed by Mr. Theodore Thomas is the best I am acquainted with; and its high merit is due in a great measure to the permanence of the body. Its members work together habitually and constantly; they take rehearsals as part of their regular work; and they look to their occupation as players in the Theodore Thomas orchestra as their sole source of income. As for substitutes, Mr. Thomas would no more accept one than a military commander would accept substitutes among his officers. There has from time to time been some talk of Mr. Theodore Thomas's unrivalled orchestra paying a visit to London, where its presence, apart from all question of the musical delight it would afford, would show our public what a good orchestra is, and our musical societies how a good orchestra ought to be formed and maintained. Before taking leave of Mr. Theodore Thomas and of American orchestras generally, let me mention one remarkable peculiarity in connection with them. So penetrated are they with the spirit of equality that no one player in an orchestra is allowed to receive more than another; the first violin and the big drum are, in this respect, on precisely the same footing. In England we give so much to a first clarinet and something less to a second clarinet, and a leader will always receive extra terms. In America one player is held to be, in a pecuniary point of view, as good as another. My season at the Academy commenced on the 22nd October--the same night as my rival's at the New Metropolitan Opera, to which subscriptions had been extended on a most liberal scale. In fact the whole of New York flocked there, as much to see the new building as to hear the performance.