 His next book, "An Introduction to the House of Commons" (1961) was awarded the John Llewellyn Rhys Prize.He wrote 'Rosebery" (1964), a biography of Archibald Primrose, 5th Earl of Rosebery and "Gallipoli" (published 1965), a reappraisal of the ill-fated Gallipoli Campaign.He then became a fellow of All Souls College in Oxford.