Between 1888 and 1890, Busoni gave about thirty piano recitals and chamber concerts in Helsingfors; amongst his compositions at this period were a set of Finnish folksongs for piano duet (Op. 27). In 1889, visiting Leipzig, he heard a performance on the organ of Bach's Toccata and Fugue in D minor (BWV 565), and was persuaded by his pupil Kathi Petri—the mother of his future pupil Egon Petri, then only five years old—to transcribe it for piano. Busoni's biographer Edward Dent writes that "This was not only the beginning of transcriptions, but ... the beginning of that style of pianoforte touch and technique which was entirely [Busoni's creation." Returning to Helsingfors, in March of the same year Busoni met his future wife, Gerda Sjöstrand, the daughter of the Swedish sculptor Carl Eneas Sjöstrand, and proposed to her within a week. He composed "Kultaselle" ("To the Beloved") for cello and piano for her (BV 237; published in 1891 without an opus number).