The twin sister of Ireland's youngest ever missing person is to meet with the Taoiseach today.
6-year-old Mary Boyle vanished from her grandparent's farm in Cashelard near Ballyshannon on the 18th of March 1977.
Today her sister Ann Doherty will take her campaign for answers to Enda Kenny in Leinster House.
Ms Doherty believes her sister was murdered and has spearheaded a major appeal to help to find her remains.
She is expected to ask for a commitment that the killer will be brought to justice.