In the lobby of the Mozarteum—of the Grosser Saal, specifically—I met a fellow critic. I said, “What are the chances this won’t be great?” He said, “Very low.” I said, “Right—like nil.” “This” was a recital by Christian Gerhaher, the German baritone, accompanied by his regular pianist, Gerold Huber. They have worked together since school days. Their program in Salzburg was all-Schumann. Out came Gerhaher, with a limp and a serious, intense expression. Sometimes his expression is half crazed. He and Huber opened with the Six Songs of Op. 107.