"Wow, this book is really helpful and good," I would say if I loved reading censored abridgements of an abridgement of an abridgement that read like a succession of Bible genealogies. I know I'm reading the one volume anthology by Edmund Fuller here, but this seems really abridged, even for an abridgement. Bulfinch favors the Roman names, I'm guessing because his intended audience was Christian, but when was the last time you met someone who called Persephone "Proserpine"? I would be a little scared of someone like that. Christianizing pagan myths is inherently embarrassing when you describe your study as being of extinct religions that "have not one worshiper among living men," and then have to draw oblique comparisons between Prometheus and Jesus, but Bulfinch set himself up for that one!
Treating the Greek and Roman naming conventions as virtually identical naturally leads the reader to thinking their contexts are synonymous as well, and if I'm not mistaken, Romans did differ in their religious practices from the traditional Greek, like absorbing the god or goddess of one regional cult into the cult of this or that one, or favoring one interpretation of a myth over another. The conflation of the two, instead of making things simpler, made me suspect the integrity of these interpretations. It's my impression that a civilization's mythology is the expression of that civilization's values, and the ancient Greeks and Romans, no matter how similar, had very different values.
Of course, that would be outside the scope of this book, but if the aim were to keep things simple for the student reader, why not stick to the Greek names? I also just didn't like the way the Greek and Roman portion was written; I didn't think approaching ancient religions from the standpoint of being deader than dead was effective in bringing the Age of Fable alive, while at the same time trying to mold them to the storytelling conventions of the Bible, ick! I peeked at the chapters for the Legends of Charlemagne and the Age of Chivalry and had the same reaction. Sorry for thinking your book is dated and dry, Mr. Bulfinch, but your Victorian sensibilities offend my modern ones :(