Síle de Valera voters to give preference votes for Anti H-Block candidates in the 1981 general election, a comment which caused controversy. She held her Dáil seat until the 1981 general election, when the constituency boundaries were redrawn. She sought re-election in the new constituency of Dublin South. This caused tension within the local Fianna Fáil party, for one of the other candidates, Séamus Brennan, was a prominent opponent of Haughey. De Valera polled relatively well but narrowly failed to be elected, losing to another Fianna Fáil candidate, Niall Andrews. She contested the constituency again at the February 1982 general election, but saw
Éamon de Valera to sleep and on one occasion, having forgotten the password, almost getting himself shot in the dark by his own men. According to one account, de Valera, on being forced to sleep by one subordinate who promised to sit beside him and wake him if he was needed, suddenly woke up, his eyes "wild", screaming, "Set fire to the railway! Set fire to the railway!" Later in the Ballykinlar internment Camp, one de Valera loyalist approached another internee, a medical doctor, recounted the story, and asked for a medical opinion as to de Valera's condition. He also threatened to sue