As a little boy grieving his mother, Séamas O'Reilly couldn't entirely grasp the monumental task it was for his father to have to raise 11 children all on his own. In his new memoir, Did Ye Hear Mammy Died?, he uses humor to get through all the sad, tragic parts of his childhood and to help celebrate the joy and love of his unusually large family. In an interview with Scott Simon on Weekend Edition Saturday, O'Reilly spoke about how his memoir is ultimately a tribute to his father who, despite the circumstances, was always a source of delight.