O'Connor, R., & Hermann, L. A. (1936). Six thousand years of Gaelic grandeur-unearthed: The most ancient and truthful chronicles of the Gael. With a preface containing history of the discovery and a dissertation presenting numerous proofs of authenticity and antiquity, and 32 illustrations. W. & G. Foyle, Itd..

O'Connor, Roger, and L. Albert Hermann. Six Thousand Years of Gaelic Grandeur-unearthed: The Most Ancient and Truthful Chronicles of the Gael. With a Preface Containing History of the Discovery and a Dissertation Presenting Numerous Proofs of Authenticity and Antiquity, and 32 Illustrations. W. & G. Foyle, Itd., 1936.