It was a minor sensation when in 1996 the conductor Osmo Vänskä recorded a completely unknown, more than 20-minute-long orchestral work by the young Jean Sibelius in Lahti: "Skogsrået" (The Forest Nymph) had suddenly re-emerged. But this was no mere rediscovery, since in his later years, Sibelius had graciously agreed that his early work could be performed in a radically abridged form. He thus left his score in a rather confusing condition. "Vårsång" (Spring Song), the second work in this volume...