The pedal harp is played with the fingertips of the first four fingers (thumb, index, middle and ring fingers). The little fingers are not used because they are too short and cannot reach the correct position without distorting the position of the other fingers (although on some folk harps with light tension and closely spaced strings they may occasionally be used). The fifth finger may also have been used on earlier, more lightly strung modern harps. Madame de Genlis, for example, in her "Méthode", published in Paris in the early 19th century, promotes the use of all fingers, while Roslyn Rensch suggests that Mlle de Guînes, the harpist for whom Mozart wrote his Concerto for Flute and Harp, might occasionally have used all five fingers when playing the harp. In more modern music, the little finger is used very rarely, for example in simultaneous cluster chords, such as in Daniel Kessner's "Sonatina". The fingertips are drawn in to meet the palm, thus releasing the string from whatever pressure was placed upon it by the fingers. The fingers are naturally curved or rounded as they touch it, and the thumb is gently curved as the tip rises to it as an arc from its base.