This site has many interesting studies on ancient Ireland, it tales and its people, in the context f locating where they lived and what they present to us today.
"This project, which is at publication stage, uses a series of field-based studies in Ireland to reveal the physical environments in which Gaelic learned families lived and conducted schools, specifically through an exploration of their settlement archaeology, landholdings and the place-names associated with them, c. 1200-1600AD. The landscape context of their lives is essential to understanding the role and identity of the learned professions as service families of Gaelic lords and it also provides insight into the character and organisation of lordship mensal lands (lucht tighe) in later medieval and early modern Ireland to c.1600."
Some Books.google.com and Archive.com hints.
1) Google lets you download a PDF of the first Volume in a series but claims no e-book for second etc volumes and offers to sell you a hard copy.
Strangely if you do the search in archive.org you will find all volumes to download for free.
2) You download a PDF and try to do a word search but it does not have embedded OCR text. Often if you go back to download page you will find a Text only option you can open. It is an HTML web file but Control-S will save it. And in Calibre E-book Management system you can convert the HTML to E-book format.
FYI, you can join us on Facebook for more Pagan Researchers Help.
The long, medial, or descendings (ſ) is a form of the minuscule (lower-case) letter s, which was formerly used where s occurred in the middle or at the beginning of a word (e.g. "ſinfulneſs" for "sinfulness" and "ſucceſsful" for "successful"). The modern letterform was called the terminal, round, or short s.
Something you will often see in old books we share.