* Marginalia are floating constucts which are already tricky,
but they are further complicated by the fact that their
composed locations are supposed to be vertically aligned
with their anchor in the flowing text. Not only is this
hard to do at best, but it's not even easy to define. For
example: what is the proper alignment when you have two
marginalia on the same word?; what do you do when marginalia
anchored near the bottom of the page won't all fit on that
page?; what happens when the anchors for two marginalia are
closer together than the height of the first marginalia?, etc.