When she grew up, Ruth would say that she could place the day that her mother had decided to go awayShe didn’t know the actual date, but she recalled the occasion: it was on the afternoon of a wet day, early in 1942, during a visit to the cinema. She thought she could even pinpoint the exact moment at which Iris had made up her mind to go, leaving her only child behind. Neither of them could have guessed then that they would never live together again.Spanning the second half of the last century,...