Lol

In any case, we now know that Foucault was quite right not to allow any quotation of his work that he had not published. He practically rewrote every book several times (except from the Roussel one) until the final product bore no resemblance to the initial drafts. So I’m not sure any manuscripts of the fourth volume would help you much.

Personally, I rely to a much greater extent on the published material, and then on the lectures. And I think most Foucault scholars are with me on that.

Let’s face it, most of us have enough on our hands with ploughing through Dits et Ecrits!

You can read Carrette’s view on this as a postscript to his collection Religion and Culture. But others have basically come out and contradicted him…

What we know is that volumes 2 and 3 look nothing like the projected volumes 2 and 3 (described in volume 1). I can’t see much in his work that could have been worked into some magically patristic volume 4. And most of his work does tend to be mirrored in the “Dits et Écrits” of the time.

The short answer is: no, you will have to refer to the physical archives in France (which you won’t be allowed to make public reference to). The long answer is: look at what he was writing at the time, the lectures he gave, the articles he wrote, and you’ll see a fairly consistent line of thought about where he wanted to get to from the philosophy of late antiquity: namely the moral sciences of early modernity.