This autumn English National Opera is exploring the Orpheus myth by presenting four operatic takes on it, including Harrison Birtwistle’s The Mask of Orpheus and Philip Glass’s Orphée. Each is being introduced in the order in which it was originally composed so that the season began with Gluck’s Orpheus and Eurydice, and now continues with Offenbach’s Orpheus in the Underworld, the first version of which premiered in 1858. It is good to see the Offenbach...