"Whenever I see a row of poplars", the much-loved tutor Ernest Barker used to say in the rich Cheshire accent he guarded so stubbornly against the corrosive influences of both Oxford and Cambridge: "whenever I see a row of poplars going on in a straight line, over hill over dale, never turning aside for forest or river, I say to myself 'The Romans! The Romans have been here! It may be sentimental, but I like it.'"