Recalling musical history

My friend Joan and I were talking music. Somehow we got around to the Mendelssohn Violin Concerto. I flashed to an incident that occurred about 50 years ago: Fredell Lack was performing that piece with the Houston symphony. They were near the end when Fredell stopped, the orchestra stopped, and Fredell, knowing they were not playing together, gave the conductor and orchestra instructions where to start again. This time they ended together.
Wondering if my memory was playing tricks on me, I wrote to Fredell who was a friend of many years. Here is her response:
"It was a nice surprise to hear from you.....Your memory serves you right. That concert you remembered that I played with the Houston Symphony and with Leopold Stokowski was a nightmare for me.The maestro got lost, the orchestra stopped playing, and I was playing alone. I suggested to his Imperial Highness that we return to the beginning of the last movement, and this time the orchestra followed ME. He was furious, and refused to bow with me. It's a famous story.
Fondly, Fredell and Ralph"