We know that he gave Aschenbach Mahler's first name, and also his facial features. So Visconti picks up on something interesting. That led me to think about ways of developing further the Aschenbach-Mahler connection.

I felt I should also contrast Visconti's treatment of the novella - usually damned by Mann fans (who typically respect Britten's more "faithful" adaptation). The Visconti film does many quite wonderful things, although there are good reasons for the condemnation.

Read Mann's notes, which contain precise accounts of cholera and its symptoms, and observe how careful he is throughout his fiction in getting medical details straight - then you might begin to wonder whether cholera is the only candidate for the cause of Aschenbach's death. What results from this, I think, is a deeper appreciation of Mann's brilliance in keeping so many possibilities in play. The ambiguity is even more artful than people have realized.

I have enormous respect for Derek Parfit, although he seems to me bound within an unfortunate philosophical tradition - rather like the extraordinarily brilliant exponents of Ptolemaic astronomy in the Middle Ages.

Sometime during the 1990s, when I was teaching philosophy at UCSD, my friend, colleague, and music teacher, Carol Plantamura, discussed the possibility of teaching a course together looking at ways in which various literary works (plays, stories, novels) had been treated as operas, and how different themes emerged in the opera and in its original. One of the pairings we planned to use was Mann's great novella and Britten's opera. Unfortunately, the course was never taught, but the idea remained with me.

After the success of Buddenbrooks, he married and fathered six children. Yet the surviving diaries tell us of recurrent sexual problems - and of Katia Mann's extremely sympathetic response to them

Look at Mann's reading habits, his explicit comments on Nietzsche, and his copy of Birth of Tragedy, and it starts to seem doubtful that this work of Nietzsche's played much role in the gestation of the novella.