[...] Martinu, “Sinfonia concertante”: 16th October is the very latest delay on which we should be in possession of the material. If you can possibly let us have it earlier, please do. I take it that a full score goes together with the material, although I have a private one.
Duration of Sinfonia Concertante: 12 to 15’ seem definitely too short an estimation for this work.
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