Variations on an ancient Celtic folk song Now I am Lamenting (Manx). As a second theme I use a famous folk song from the Andes region that is usually played on sikú (or zampoña) and antara panpipes.
The piece starts rather mystical but be patient, the theme will be presented accompanied by the second theme, culminating in a South American dance on full organ. Then it ends in serenity like it started. Hope you like it. Technically I tried to make it as playable as possible although this is rather advanced. However, it looks more difficult than it is. The score is presented for download as a PDF on a link at the bottom of this page.