Dear astronomers,

I'm trying to identify a work which is found in Brugge, Openbare Bibliotheek, Ms. 526. It's a 17th-century manuscript containing various works on astronomy.

The work starts with a table of contents called 'synopsis ad sequentem tractatum':
1. Firmici aenim ex diversis auctoribus ostenditur in hoc tractatum
2. Epocha Dilunii a Chaldaeis
3. Periodus Sothiaca et ex illa quodam loca
4. Hipparchi et Ptolomaei aeno bene multa
5. Ex magistri Sui saeculo item et suo plurima expensa
6. Manlii loca eadem quo Firmici ostensa non admittunt illim Firmico vetustiorem
7. Caluri Manlii

The first chapter begins with 'Julius Firmicus Maternus Siculus statim initio [filio] profationis scribens ad Manortium Lollianum Campanio Rectorem...'.

Is this the Matheseos treatise? It looks more like a commentary on the Matheseos, but I have no idea by whom.

I would very much appreciate your help.

Thank you in advance.

Best regards,

BibBrugge