The story behind this virtuoso composer and his auspicious beginnings has been the source of fact AND rumor since his own time. It was one of history’s first “stage parent” situations. With a little encouragement from his father, this little tyke started his performing and writing before many of his peers were speaking in complete sentences. Later he would compose this piece and act as the soloist for its first performance. And as a result, the left-hand part is largely missing, presumably to be filled in by himself as he performed the work.