Ron Chaplin wrote:

>At the concert I attended, Rachel Barton was the soloist for Bruch's
>Scottish Fantasy.  ...For an encore, she played a solo piece by the
>composer who had been called the successor to Paginini, because of the
>difficulty of his work, based on a Irish folk song.

Possibly the variations on "Last Rose of Summer" by H. W. Ernst.

Chris Bonds