I like to focus on the varieties of paper, the different sizes and watermarks, evidence perhaps of what was typed when and sometimes where and by whom.

I was suckered in by the myth of the man [ William Burroughs] as much as by his work.

I tell this anecdote with tongue in cheek at the start of my book William Burroughs and the Secret of Fascination, but my academic involvement with Burroughs was entirely due to my tutor at Oxford, Peter Conrad. I was discussing with him the idea of staying on to do graduate work and when I tossed the name of Burroughs into the conversation - well, he let it fall loudly onto the floor, and proceeded to cross himself as if warding off an evil spirit. Since I was very ambivalent about an academic career in any case, that decided it for me.

A good deal of editing a manuscript looks like mechanical work, as if anyone with time on their hands and a magnifying glass could do it. But at a certain point, you need a strong interpretive conviction and, as you say, an "intangible" relationship to what you are doing.

I like to focus on the varieties of paper, the different sizes and watermarks, evidence perhaps of what was typed when and sometimes where and by whom.

That rewriting of literary history is most obvious in the case of The Yage Letters, where I was able to show that the true history inverts the official one.

It started out as a typically insane idea to map every part of the published text in terms of its manuscript provenance and history, and to establish the cultural meaning of the book, part and whole.