In 1917, Hugo Leichtentritt suggested that the Second Violin Sonata Op. 36a (BV 244), completed in 1900, "stands on the border-line between the first and second epochs of Busoni", although van Dieren asserts that in conversation Busoni "made no such claims for any work written before 1910. This means that he dated his work as an independent composer from the piano pieces "An die Jugend" ... and the "Berceuse" in its original version for piano." (These works were actually written in 1909.) The Kindermann "Busoni Verzeichnis" lists over 200 compositions in the period to 1900, which are met with very rarely in the contemporary repertoire or in recording, mostly featuring piano, either as solo instrument or accompanying others, but also including some works for chamber ensemble and some for orchestra, amongst them two large-scale suites and a violin concerto.