" The Prince stood beside the timpanist to count his rests for him and see that he came in in the right place. I suppressed all the trumpet passages which were clearly beyond the players' grasp. The solitary trombone was left to his own devices; but as he wisely confined himself to the notes with which he was thoroughly familiar, such as A flat, D and F, and was careful to avoid all others, his success in the role was almost entirely a silent one. "

― Hector Berlioz , The Memoirs