He guessed her to be a mezzo-soprano.
To sing this, Elisabeth would have had to be classically trained, and she would need to sing the highest end of her range if she was indeed a mezzo-soprano.
Mark is also working with the great mezzo-soprano, Sally Burgess, with whom he has toured and recorded.
The opening concert of the Series is a program built around the extraordinary talents of the Hungarian mezzo-soprano Katalin KÃ¡rolyi.
Acclaimed mezzo-soprano Anne Mason and soprano Sarah Rhodes will portray Scotland's doomed queen and her royal rival, Elizabeth I respectively.