Harmony was not the leitmotif of the Tolstoys's marriage. In wedlock for forty-eight years, some of them happy, many of them turbulent, the couple had reached the nadir of mutual exasperation in 1910, the final year of Tolstoy's life. No biography could illustrate this more graphically than these diaries for that fateful year. In addition to the Countess's own diary and day book, salient extracts are also reproduced from not only from Leo Tolstoy's...