 She gave the first performance of his 8 French Folksongs, in a 1942 National Gallery recital with Gerald Moore, and she and Britten later recorded five of these songs.However, by 1942, Britten's knowledge of voice and vocal technique had greatly increased, and he preferred Peter Pears's interpretation of "Les Illuminations" to Wyss's performance, which he described to a close friend as "hopelessly inefficient, subjective & (of all things) so coy & whimsey!!!