George Thomson of Edinburgh, a notable promoter of Scottish music, encouraged settings of his nation’s folk songs. In particular, he found a rich source of arrangements in Vienna, where he commissioned first Haydn and then Beethoven to set a large sequence of poems, including those of Robert Burns and Sir Walter Scott. Thomson envisaged simple works, agreeable to amateurs, but Beethoven found it impossible to compose within such limitations and his settings, which include Irish and Welsh songs, with the accompaniment of strings and piano, have proved perennially popular.