sentences:  After completing his bachelor's degree, he continued his graduate studies at Magdalen and while doing so was appointed assistant lecturer at University College, London in 1934–36.In 1935, Gibbs completed his D.Phil.thesis in medieval history under the direction of K. B. McFarlane on "'The history of Reading in the later Middle Ages, considered with special reference to the importance of the gild merchant in mediaeval seigniorial boroughs".