The gloom which has hung over the Opera House for a few nights has passed away. The two tenors who succumbed to the intolerable fickleness of our climate are once more able to sing. One of them, Herr Perotti, made his reappearance last evening in the title rôle of Gonuod's "Faust." It may as well be noted here that he sang in German, and so did every one else in the cast. His voice showed the effects of his recent cold, but the moderation which was forced upon him was advantageous to his performance.