Although the earliest texts have been lost, excerpts were quoted or paraphrased by later authors. The main islands were called "Ierne", equal to the term Ériu for Ireland, and "Albion" for present-day Great Britain.
Despite the loss of early texts, excerpts were reproduced or summarized by subsequent writers. The primary islands were known as "Ierne," which corresponds to the term Ériu for Ireland, and "Albion" for modern-day Great Britain.