Maureen Paula O'Sullivan was born in County Roscommon, Ireland, on May 17, 1911. The future mother of Mia Farrow was a schooldays classmate of Vivien Leigh at the Convent of the Sacred Heart at Roehampton in London. Even as a schoolgirl, Maureen desired an acting career; she studied hard and read widely. When the opportunity to be an actress came along, it almost dropped in her lap. The director Frank Borzage was in Dublin filming “Song o’ My Heart” (1930) when Maureen, then 18, met him. Borzage...