Book III progress update

To keep everyone posted: Book III nears its first clean draft. I have five short interstitial passages left to write, after which I'll need to do some passes of reading aloud and editing. Right now it lasts for 782 lines, so it seems like it'll wind up running to about the same length as Book I.

Since books I–III form a fairly coherent unit, I'll go back and tweak the metre a bit in Book I—I've grown better since I composed it!—before devoting myself to Book IV.