volume was mostly written by Nora, although Chadwick wrote its sections of Slavic, Hebrew and Indian literature. The third volume was mostly written by Nora, and included sections on Tatar, Polynesian and African literature, while the concluding section, summarizing all the material of the three volumes, was written by Hector. The Chadwicks were proficient in nearly all of the languages of the literature covered in the book, and it took literary, historical, philological, anthropological and archaeological evidence into account. It has been described as a pioneering and masterful study, and the finest work of Chadwick's career. Last years at Cambridge It was at his country home in Vowchurch that Chadwick began writing his Early Wales and the Saxon Penetration of the West, but the threat of an invasion of England eventually convinced him to abandon the project in 1940, as he felt the looming prospect of a German invasion had too many parallels with the Anglo-Saxon settlement of Britain. When World War II began in 1939, the Chadwicks moved to a new home at Adams Road. During the war, many younger members of the staff left University, and Chadwick once more conducted most of the teaching at his Department for Anglo-Saxon and Kindred Studies. In his notable "Who was he?", published in Antiquity in 1940, he examined the site of Sutton Hoo, and suggested that its magnificent burial was of Rædwald of East Anglia. Upon attaining the age limit in 1941, Chadwick retired as Elrington and Bosworth Professor of Anglo-Saxon and became an Honorary Fellow at Clare College, but at the request of the university, he continued teaching as head of his department. Chadwick was able to combine his leadership of the department with writing and research. In his The Study of Anglo-Saxon (1941), Chadwick surveyed the history and contemporary state of Anglo-Saxon studies. In this work, he argued in favour of an interdisciplinary method for the study of the Anglo-Saxons, and suggested that Anglo-Saxon studies should be split from the field of English studies and made into a distinct and broad discipline akin to the Classics. Both in his The Study of Anglo-Saxon, and his later "Why compulsory philology", which appeared in The Universities Quarterly for 1946 and was written at the request of the National Union of Students, Chadwick argued against the teaching of philology as a compulsory subject, and instead considered it best suited for post-graduate work.