Wonderful book! Thanks to Janet for the recommendation.
I bought a pile of almost 50 old "traditional Regencies" back in July at a UBS I visit every once in while, at a cost of about a quarter each. I discarded about 15 of them almost immediately, after checking their reviews on GR and Amazon. Of the remaining ones from that pile that I've read so far, a couple have been keepers but most have not. But this book alone makes the entire purchase worth it.