Si Bheag Si Mhor (meaning “Small Fairy Mound, Big Fairy Mound”) is an Irish folk tune attributed to 17th century composer Turlough O’Carolan. 

The version here in the Shearer Method, Book I (pp. 167-7) is an arpeggio study of p,i,m,a,m,i  arranged by Alan Hirsh, beautifully performed by Thomas Kikta.