Cicero does not attribute the theory presented in the section II 49 to a particular Stoic philosopher, and one is tempted to think that the works of Cleanthes, the second scholarch
of the school, are its ultimate source.
It commemorates Plutarchos, perhaps the famous 5th-century neo-Platonist who became scholarch
of the Academy.
Broido's paper is not referred to in this book, but it notes that Tsong kha pa (1357-1419), the "founder" and scholarch
par excellence of the Dge lugs pa school uses dgos pa (*prayojana) in the context of supreme buddhahood, enlightenment, and therewith calls into question Cabezon's characterization of both "purpose" and "ultimate purpose." Vasubandhu's (fourth or fifth century) Vyakhyayukti (Logic of Explanation), a work with which the author is quite familiar, having been among the first to publish on it, describes yet another pentad for the exegesis of scripture qua sutra without which a sutra cannot be correctly explained, in which the first category is also prayojana but where that of prayojanaprayojana is absent; see J.
13.39) in which he reminds Atticus to send the books of the Epicurean scholarch
Phaedrus that he had requested.
The scroll is one of the works from the Herculaneum library that survived the Mount Vesuvius eruption in the year 79 CE--an Epicurean Nag Hammadi--and it's based on the notes taken during discussions about death that took place between the Epicurean scholarchs
(heads of schools) and their disciples during the first 200 years of the school's history.