The ""Ancient Laws of Ireland V4: And Certain Other Selected Brehon Law Tracts"" is a comprehensive book written by John O'Donovan and published in 1879. The book is a collection of ancient legal texts and laws from Ireland, known as the Brehon Laws. These laws were used in Ireland from the pre-Christian era until the 17th century and are considered to be one of the most important sources of information on early Irish society.The book is divided into...