Clair Wills’ prize-winning memoir ‘Missing Persons, or My Grandmother’s Secrets’ describes the painful, sometimes catastrophic, results of sexual secrecy in 20th century Ireland on four generations of unmarried mothers.  ‘The Family Plot’ is an compelling exploration of the institutions that imprison us.  Here the renowned cultural historian talks to biographer Frances Wilson about reproductive rights, institutions and society in Ireland, Britain and the US.   Clair is Regius Professor of English at Cambridge University.