From the Sydney Morning Herald:
In the 18th century, social convention dictated women in Europe were not allowed to play the violin. Maria Anna ''Nannerl'' Mozart, born in 1751, was brilliant at it. Women were not meant to be composers. Nannerl was an inspired composer.
But she had a talented younger brother, Wolfgang, who got all the attention
The story is only partly speculative, told as if from inside the Mozart family. It is definitely intriguing and perhaps a little sad. After the first burst of life as a young prodigy, Nannerl's evident talents had to be left unused when Wolfgang overtook her place in their father's ambitions.