Perhaps a reference to "Peg" Entwistle -- the 25-year-old starlet who gained fame by jumping to her death from atop the Hollywood sign. After success on Broadway, Peg got her big debut in a 1932 movie that the studio ended up hating, and cutting out most of her part. The letter is her suicide note, published in the LA newspapers, of the pain she'd experienced. When she herself falls, it comes back to her -- seeing as one does all three-dimensions of a tragic ending (as foreign films are more known for ending in tragedy, rather than the happy "Hollywood" endings).