In 1910 T.E. Lawrence submitted his Oxford BA thesis, 'The Influence of the Crusades on European Military Architecture to the end of XIIth Century' (the thesis is kept in the Fellows' Library of Jesus College, Oxford). In 1936, after Lawrence's death, a revised version of this was published as Crusader Castles (Golden Cockerel Press, London, 1936). Some of the research for Lawrence's thesis may have been drawn from notes he made as early as the summer of 1906 when on his first cycling tour of French castles. He returned to France the following two summers when he made further notes and drawings.