Yet Dr. Brown observes, it is during this period that Tchaikovsky is perhaps at his most exposed: in his responses to ordinary situations we can most clearly see his idiosyncrasies and rapidly changing moods, his likes and dislikes, his kindness and compassion, his openhanded generosity and calculating deviousness, his gentle but constant envy of those whose sexual nature permitted them the experience of normal family life. Musically, these...