BBC Radio 4 on Instagram: "In the third episode of Lady Killers, Lucy Worsley and the team uncover a case of infanticide in the north of Ireland in the 1860s In this episode Lucy is joined by the Right Honourable Dame Siobhan Keegan, the Lady Chief Justice of Northern Ireland, who was one of the first women High Court judges in Northern Ireland. Lady Killers with @lucy_worsley | Listen on BBC Sounds"