Felden, Annotata

Another interesting source, one of the earliest commentaries on Grotius:  Johannes Felden's Annotata in Grotium. 

This is a useful resource.  Could this be the first time that Grotius's legal theory is reframed explicitly in the language of perfect and imperfect jus?

The attempts to integrate Grotius's system with Aristotle is also useful.  But this is still before Gronovius, who is more reader-friendly.