Critique on two early works on the history of Irish pilgrims in Italy: M. Stokes, Six months in the Apennines (London, 1892) and A. M. Tommasini, Irish saints in Italy (London, 1937), observing that the study of the relationships between pilgrim routes to Rome and the cult of Irish saints in Italy remains a desideratum.
Studies the ordering of sections §§20-23 (as ed. by Ludwig Bieler 1952), arguing that §21 was dislocated in the early transmission of the text and that the original sequence §§20-22-21-23 should be restored.