Interpolations in “Wandering Rocks”

@yellwork asks:

Would we be able to use <div> (or something else) to thread the various interpolations back to their “parent” <div>, where appropriate? I like the idea of making explicit in the markup some of the internal connections and reiterations of the book.

@c-forster responds:

I think marking this up would be a good idea--but I think it would require a different strategy. The divs are not granular enough (you want to be able to the interpolated/reiterated text, not just the section from which it came, right? Would something like this work, using and refs?

<lb n="100201"/>raised his cap abruptly: <span xml:id="l100201">the young woman 
abruptly bent and with slow care
<lb n="100202"/>detached from her light skirt a clinging twig.</span>

And, later in the same file:

<p><lb n="100440"/><ref target="#l100201">The young woman with slow care detached from
 her light skirt a 
<lb n="100441"/>clinging twig.</ref>

There is, in "Wandering Rocks" a clear "original," and "reference" structure I think. It would be nice if were bidirectional (that the source pointed to where it was later interpolated), but off the top of my head I can't think of an obvious and semantic way of doing it. (Simply adding more ptrs/links--as folks do when they make HTML footnotes, with links back to the text seems wrong here.) I'd like to hear others thoughts on the best approach, but once there is consensus I'm happy to hop in and add the appropriate markup. (Note also, I've just created a rather weak id for the source span using the line number... I don't think that's a very good idea.)