"It was foreseen in the morning that the attendance would be greater even than on Friday night. The American Museum and Hall's Music Store were besieged through the whole day and up to the very hour of commencement. At the former place the crowding for tickets was tremendous, the very sidewalk in front being blockaded most of the time. At seven o'clock, when we took up the line of march for Castle Garden, both sides of Broadway were thronged, and the main avenue of the Battery was filled with a steady stream of persons pressing into the Castle gate. As on the first night, a double line of policemen had been formed, which effectually prevented all disorder. A few more lamps were introduced into the hall, rendering its aspect much more light and cheerful. By eight o'clock the vast hall was crowded to overflowing. Scarcely a foot of space was unoccupied; from the very edge of the ceiling to the orchestral platform in the centre, around the immense span of the building, there was but one dense mass of heads. We should, at a rough guess, estimate the number in the auditory at SEVEN THOUSAND. A much larger proportion than on former nights were ladies, and for the first time we caught glimpses of the fashionable society from above Bleecker. It is worthy of note, that the first and second concerts, immense as they were, were composed almost entirely of the intelligent and appreciative middle class. "Some disturbance was created by a rush to obtain seats, made by those who had promenade tickets for the balcony, the moment the orchestra began to collect. This proceeding, in violation of the specified arrangements, was most disgraceful. The ushers did all they could to prevent it, but in spite of all their efforts many persons who arrived before the hour of commencement were deprived of their seats. It would be a good plan to have a few policemen in the balcony on future occasions.