Glazunov was supposed to be coming to the Graduation Concert rehearsal today; Tcherepnin had told me that the composer wanted to conduct his concerto himself. At first I was peturbed by this: were Zermüllen and Motseikevna* up to something? But it transpired that Glazunov had from the very beginning intended to take the baton, so I relaxed. Tcherepnin saw some advantages in this, in that the presence of the Director would encourage the orchestra to pay more attention to what they were doing. Today Glazunov rehearsed just the orchestra without soloist, at enormous length, taking up the whole rehearsal. I sat talking amicably to Motseikevna.