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.

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

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.