 If we adopt that last marker of dates, the late 1920s to the early (or mid-)1930s, we can address, in general, the objects of interpretation that have provided the basis for a middle Wittgenstein. Although everything in the Nachlass is now digitally available to the aspiring interpreter, the published versions of typescripts/manuscripts of talks and notes (sometimes dictated to students) have been the evidence upon which middle Wittgenstein interpretation has flourished. These are (in chronological order of their occurrence, not their publication) “Some Remarks on Logical Form” (1929), “A Lecture on Ethics” (1929), Philosophical Remarks (1929–1930), Philosophical Grammar (1932–33), The Big Typescript (1932–1933); the Blue and Brown Books (1933–1935), and “Notes for Lectures on ‘Private Experience’ and ‘Sense Data’” (1935–36). Just as illuminating, even tantalizing, are the publications of notes taken by participants in Wittgenstein’s classes in those philosophically eventful years, since it was in those surroundings that Wittgenstein was working out – live – the deliberations and moves into what would become the later Wittgenstein. Supplied by Alice Ambrose, Desmond Lee, G. E. Moore, Rush Rhees, and Friedrich Waismann (on Wittgenstein’s conversations with members of the Vienna Circle), these are volumes replete with questions of philosophy, meta-philosophy, method, and style that provide the Wittgensteinian interpreter with voluminous raw data in order to characterize a middle Wittgenstein.