A.V. Nezdhdanova (pupil of U.A. Masetti), V.R. Petrov (pupil of A.I. Barzal) and E. Gan (pupil of Ye. A. Lavrovskaya) during rehearsals for the students` examination performance of O. Nicolai`s opera Die lustigen Weiber von Windsor (the Bolshoi Theatre (1900)