Beautiful! I wonder if Jimmy Maher's heard about this; he wanted something like it for The Analog Antiquarian back ages ago before he kicked that off, as a way

Beautiful! I wonder if Jimmy Maher's heard about this; he wanted something like it for The Analog Antiquarian back ages ago before he kicked that off, as a way of reflecting the span of history in the structure of the index/TOC, but we never could figure out really how to get it to go anywhere we liked. It's a surprisingly tricky problem, and this is an impressive realization!