var vtn_player_type = "vp";var ven_video_key="NjA2MDQ4fHwxNDcxfHwwfHx8fHx8";var ven_width="660";var ven_height="409";A collection of rare manuscripts by composers Mozart, Beethoven, Shubert and Bizet are due to go on sale at auction on December 17.
