Season 1911-1912. Conductors: Glazunov, Safonov, Schneevoigt. Soloists: violinists Franz von Vecsey, May Harrison, pianists Vera Scriabina, K. Igumnov, Wilhelm Backhaus, cellist Beatrice Harrison, violist Oskar Nedbal and others.

The Imperial Russian Musical Society. Season 1911-1912. Programs of 8 Symphony Concerts and 7 Chamber Evenings.

For example:
[p. 21]
The 4th Symphony Concert. November 23, 1911. Conductor Alrxander Glazunov. Soloists: May Harrison (violin) and Beatrice Harrison (cello). In the program: 1) Gluck - Iphigénie en Aulide Overture 2) Brahms - Concerto for Violin and Cello ("Double Concerto") 3) Glazunov – Violin Concerto in A-moll 4) Tchaikovsky – Cello Variations 5) Liszt - 'Gaudeamus Igitur' Humoreske.
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