Marmite - like that other little black-jar job, Bovril - is so much a Mark 1 staple-of-Empire brand, so much part of the Edwardian world of enamel advertising signs, the history of grin-and-bear-it industrial food.

Successive generations of middle-class parents used to foist their own favourite books on their children. But some time in the late Eighties it began to wane - not because children had lost interest in adorable animals but because most of it was available on useful, pacifying video.

This may sound insulting to some of my cult studies friends, but there's a lot of cult studies people who ignore, shall we say, the wider canvas - because they simply don't know about its existence or they don't know how it operates.

Eponymous brands aren't that popular with analysts and investors now. You can only take an eponymous brand with a living figurehead so far, they argue. What happens when they grow old and die? What happens when they misbehave and go seriously off-brand?

By the 1980s, practically no one under 60 in the real civilian world wore hats for anything except weddings, funerals or Ascot. Hats had been in competition with hair, and hair had won. Thirty years before that, Brits of all classes and ages wore hats all the time.

Real writers - serious writers with serious subjects, who earn their living at it - all seem to write in small rooms with that knotty-pine 1974 look on the top-floor rear of their houses. Rooms with views.

Rock and roll is the hamburger that ate the world.