Notice. The management regrets exceedingly to announce that the sudden indisposition of Signor Brignoli : (as will be seen from the annexed certificate from Doctor W.F. Atlee) will prevent his appearance this evening. They are happy to state, however, that the other artists, L.M. Gottschalk, M'lle Cordier Carlo Patti, Carl Wolfsohn Mr S. Behrens, in order that the public shall not be disappointed, will amply supply the deficiency in the programme. Those who desire it, may have their money refunded at J.E. Gould's Music Store, S.E. cor. 7th and Chestnut Streets. Medical certificate. Philadelphia, Jan. 18th, 1864. I certify that Sig. Brignoli has an attack of la grippe, (a peculiar disease of the throat,) which renders it impossible for him to sing this evening. / Walter F. Atlee, M.D.