I just deleted my last comment, because I did a little searching in the filesystem, and here are some English copies that have been sitting on the site for years. I’m not sure where they are linked from or if they contain the full book.
- the_phoenix.txt
- the_phoenix_0.txt
- the_phoenix_1.1.txt
- the_phoenix.pdf
- the_phoenix_in_modern_english_transcribed_by_decimus.pdf
Edit: it looks like it’s from Petrus Ravennas - the Phoenix
In any case, here’s a version that was machine translated. I didn’t proofread it yet, but I’ll keep the link here in case it might be useful.