Forcings is something like ‘the collected works of A. J. Bartlett’ that no-one else will collect. The unpublished stuff, the lectures, the one-offs, the occasional digression and whatever else comes to mind. The greater part of Forcings at this stage is the lectures (but let’s call them lessons). These were given over the course of a few short years and only once. So unless you were there, you don’t know them. Of course some of the lesson material found its way into some published stuff but never in the way I am presenting them here.