What is the importance of Raleigh House in the book, A Ghost in the Throat?

Raleigh House is the home where Eibhlín Dubh and Art O’Leary lived after their marriage in 1767. After Art was murdered, Eibhlín buried the head of his horse beneath the hearth in the house. During the narrator’s research she is fixated on touring the home in order to discover more about the poet. Despite her letters to the new residents, she is not allowed to enter and decided to send flowers instead. Doireann feels that if she cannot physically enter Raleigh House, the flowers are a vestige of herself that will be welcomed over the threshold.