Volume 26 of this extraordinary series of the complete Schubert songs takes us, appropriately, to the year 1826, and another one of those marvelous "Schubertiads," or Schubert evenings. In addition to John Mark Ainsley, soprano Christine Schäfer and baritone Richard Jackson, along with the London Schubert Chorale, assist in the festivities, with Graham Johnson presiding at the piano. The featured items are Schubert's Mignon Songs from Goethe's Wilhem Meister, masterpieces all. --David Hurwitz