Some of the Preludes were written during Chopin and George Sand's stay at a monastery in Valldemossa, Majorca in 1838. In her "Histoire de ma vie", Sand told how one evening she and her son Maurice, returning from Palma, Majorca, in a terrible rainstorm, found a frantic Chopin who cried, "Ah! I knew well that you were dead." While playing his piano he had a dream: