What are these mathfrak/mathcal/mathbb fonts?

Question

I recently came across this preprint of Pierre Berthelot, and became a little obsessed with the very pretty typesetting. I determined that the text font is New Century Schoolbook or something very close, which \usepackage{fouriernc} does a fine job of emulating. However, one thing which this package does not capture are the preprint's neat \mathcal, \mathfrak, and \mathbb fonts. Here are some screenshots of those:

The pdffonts tool claims that these are "Atalante" or "Beaulieu" fonts, but a google search for these did not turn up anything useful (although a recording of a Tolkein poem in one of his obscure Elvish languages was quite interesting!). Any help on how to use these fonts would be appreciated.