See Chapter 18, Legends and Tales, and section The Castle Ghost, page 207 which also recounts the article in 1962 by Patrick Denis O'Donnell in Ireland of the Welcomes.
Find information in Chapter 18 titled "Legends and Tales," focusing on The Castle Ghost, located on page 207. This area also discusses the 1962 article penned by Patrick Denis O'Donnell in Ireland of the Welcomes.