Beethoven’s letters show an extensive and prolonged correspondence with George Thomson, a keen amateur musician who had made it his task to collect and publish settings of folk songs, commissioning the likes of Pleyel, Koželuch and Haydn. The Opp. 105 and 107 collections, written for piano with optional parts for flute or violin, are filled with delightfully decorative but virtuoso writing. This recording offers versions with improvisation and ornamentation by Patrick Gallois based on the performance practice of the early eighteenth century.