I've always felt Orson Welles' second feature, the memory-movie masterpiece "The Magnificent Ambersons," got a bad rap because: 1) it isn't "Citizen Kane"; and 2) it isn't the perfect creation Welles intended it to be because, as we all know, RKO re-cut and re-shot parts of it, including the last two scenes (which are so not Welles they don't really affect you much; they're like background noise that wakes you out of a deep sleep). Well, OK, "Ambersons" isn't "Kane" -- it's not as much fun as "Kane" (few movies are), but it's every bit as accomplished and it goes deeper into its characters and its evocation of the past. And, yes, I'd give my (fill in portion of anatomy here) to see the lost footage restored (although you can read the cutting continuity of the unfinished 132-minute version Welles left behind when he went to Brazil in March, 1942, and see stills of the missing scenes -- so you can imagine the finished movie, even if you can't actually see it).
All of this is to say that AltScreen has published a long piece I just wrote about this, one of my favorite movies. It begins with a more-or-less shot-by-shot analysis of the nine-minute prologue, and how it sets up everything else in the movie. You can read it here: "The Magnificent Ambersons: The Past is Prologue." The film has only recently been made available on Region 1 DVD (and even then as an Amazon-only bonus with the new Blu-ray of "Kane," though it shows up on TCM occasionally). A few excerpts, to give you a taste:

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