But he continued to compose, one of his major successes being Valse triste, one of six pieces of incidental music he composed for his brother-in-law Arvid Järnefelt's play Kuolema (Death).
Men han fortsatte med at komponere, en af ​​hans store succeser var Valse Triste, en af ​​seks stykker af tilfældig musik, han komponerede til svogeren Arvid Järnefelts skuespil Kuolema (Død).