The compositional origins of the Piano Sonata No. 2, the first mature piano sonata Chopin wrote, are centred on its third movement ("Marche funèbre"), a funeral march which many scholars indicate was written in 1837. However, Jeffrey Kallberg believes that such indications are because of an autograph manuscript of eight bars of music in D major marked "Lento cantabile", apparently written as a gift to an unnamed recipient. The manuscript, which is dated 28 November 1837, would later become part of the trio of the "Marche funèbre". However, Kallberg suggests this manuscript may have been intended as the beginning of an earlier attempt of a different slow movement instead of being part of the "Marche funèbre", writing that "it would have been unusual for Chopin to make a gift of a manuscript that, if it did not contain an entire piece, did not at least quote the beginning of it", as almost all of his other presentation manuscripts did. He also suggests that a four-hand arrangement by Julian Fontana of the "Marche funèbre" may be connected with an abandoned piano sonata for four hands that Chopin wrote in 1835, originally to be published as his Op. 28 (which was instead appropriated to the 24 Preludes, Op. 28), therefore raising the possibility that the movement may actually date from 1835 instead of the generally accepted 1837.