In 1936, Offler was elected to a
research fellowship at his college; he held it for four years. During the
Second World War, he fought in an
anti-aircraft regiment of the
Royal Artillery, initially in Scotland and Ireland but from 1942 in
North Africa (including a period of secondment with the
Free French Army in 1943), Italy and France. On
demobilisation in 1946, he took up a
lectureship at the
University of Bristol. In 1947, he was appointed
Reader in Medieval History at
Durham University. He wrote
A Short History of Switzerland (1952). He was promoted to
Professor of Medieval History in 1956 and retired in 1978. Though he continued to write articles on medieval German history into the 1950s, Offler had already turned to editing
William of Ockham's political works, a project begun by
J. G. Sikes, who bequeathed his papers to Offler (who had edited a text for the volume and continued
R. H. Snape's version of another) and
R. F. Bennett in 1941. The project published editions of Ockham's texts under the title
Opera Politica; Offler edited the third volume, which came out in 1956. Bennett had carried out a revision of his and Sike's earlier work on volume two, but left Offler to complete this after 1958; the edition came out in 1963. Offler revised the first volume (published in 1974) and then completed the final, fourth volume of the series, which was not published until 1997. Alongside his work on Ockham, he was also interested in the medieval history of the
north of England, especially Durham and its bishops. He edited
Durham Episcopal Charters, 1071–1152 for the
Surtees Society (1968), of which society he was president from 1980 to 1987. Offler was elected a
fellow of the British Academy in 1974. He died on 24 January 1991. A compilation of his writings was edited by A. J. Piper and A. I. Doyle and published as
North of the Tees: Studies in Medieval British History (Aldershot:
Variorum, 1996). == References ==