Our usual problem in history (of economics) is a lack of information. Archival sources, if available at all, always present gaps of correspondence between people you just know should be there, and never contain that vital review report, or the minutes of that one crucial meeting. Moreover, if the people you write about are alive and willing to talk, it turns out they’re only human: they’ve forgotten the vast majority of their past, mix up events and people, mistake a recollection they once read for their own memory, or even willfully rewrite history. All too bad, although it gives us the possibility, perhaps even obligation, to speculate, interpret, and fill in. And then of course spend hours and hours discussing with one another whether we have done so correctly.