In January I wrote two posts here summarizing the book Sybil Exposed, by Debbie Nathan. Here is one link , and here is the other . Today I'd like to go back to that book, and to the question of the truth about "Sybil," the multiple personalities case immortalized in a 1973 book and 1976 movie. I've given the gist of Nathan's take on this story in the earlier two entries. What I'd like to ask today is this: how did the world come to know that the real 'Sybil' was Shirley Mason of Dodge Center, Minnesota. Nathan doesn't claim to any originality in this. As I noted in one of those earlier posts, "anyone who had been in the Mason family's social circles during Shirley's childhood and who read the book ... could make a fairly confident guess about who the book was about, and it seems at least a few did so." But for the broader world, the disclosure came due to work by Mikkel Borch-Jacobsen and Peter Swales in the 1990s...