Professionally, the years at Hull, the Fifties, were years of teaching-and-writing. The hyphenated form is meant to indicate that the two activities were almost entirely enmeshed. This is one of the great advantages and pleasures of university external teaching. Your subject may and should be your central professional focus; but you have no captive audience. Your students come to classes by choice and often at considerable inconvenience; their backgrounds vary and their kinds of capacity; they are not examination-selected and semi-captive eighteen to twenty-one-year-olds. Without reducing the demands of the subject you have to ask yourself how you would implicitly justify to your students their expenditure of time and trouble, how best you can link their studies with their own experience, and what that must involve in shaping a course and finding the proper words to present it.